I fail to see the fun in not wearing a corset! 
Steampunk would be just incredibly awesome! I’m worried most people don’t know about the genre though, and will just think it a bit on the weird side.
No goggles? Then it’s just bionics with a lot of brasswork. 
As for referencing the Dickens Fair, Sandra Battye took the words right out of my mouth. A bit over two years ago, we had our formal wedding at the Dickens Fair.
Forgot to say that the Dickens Fair is nailed down more or less to 1840-1870. This gave us a good span of time to play with and several styles, much like in more recent time, we tend to think of each decade as having a distinct style.
You could print out part of the wiki and some pics and send it as a brochure. Just say “Jules Verne Meets Bonanza!”
In 1882 Oscar Wilde toured America- from the robber baron halls of NYC to silver mines under Colorado to saloons so wild they’d had hangings soon before he got there- dressed in outfits like this and this and this, only marginally if any less outlandish then than now. To me he is the official ancestor of Steampunk. (Wilde’s only biological descendant courts a resemblance just doesn’t quite have his ancestor’s courage.)
I’d go searching around for the descriptor ‘Victorian’; that is a specifically defined subset, which has just rocketed back into popularity lately due to the steampunk craze; you should have zero problems finding an outfit.
Figuring out your duties as toastmaster should be as easy as asking the happy couple what it is they expect; it may not fit precisely with whatever description is on the net.
Civil War soldier
Wild Bill Hickok
Plain old black loose pants, a white shirt and and a black waist coat seem to be wedding fare in historical wedding photos in the Wisconsin archives.
It was also a big time for circuses, so you can go as flamboyant as you like.
Google images of HBO’s Deadwood.
Still fromthe Deadwood wedding episode (Alma and Ellsworth).
And at the reception be sure to yell in your best Calamity Jane voice “We ain’t done f*ckin’ dancin’ yet!”
Consider what your SO will wear, also. If she is wearing silk (satin, taffeta, etc.), you should wear the ultimate of formal wear. If she will be in cotton, linen, etc. you should go with less formal materials and colors (or vice versa).
Are you in the US or Norway? If you are in Norway I can’t help you find a tailor. If the US, besides the costumers listed on the web, try theatrical costumers (particularly if you are near NYC or LA) to see if you can rent an outfit for a week. If all else fails, check with tux shops to rent a morning suit or white tie/tails and add period touches with accessories.
I have Deadwood on DVD and will definitely check it out. I kind of think of it more as having a dirty, dusty cowboy thing going on, but seeing the images reminds me that there were indeed quite a few fancy-schmancy dressed characters there.
She’s doing a more subtle/classic thing, with a dress that is inspired by Victorian times (I lack the terms and lingo to describe it properly). I doubt it’s silk, probably cotton, but what do I know. Anyway, subtle has never been quite my thing, so I guess we’ll just have to complement each other 
I am in Norway, so renting an outfit is out of the question. I was hoping to find a tailor/costumer, preferably with a webpage displaying some of their work, and who could make something based on my measurements and send it to me. This one looks promising, but only dresses seem to be listed under “Victorian”, and it’d be nice with a couple of alternative shops/tailors for comparison.
Yeah, and which area… Someone dressed like this, like this, or like Emiliano Zapata or Pancho Villa may not have been what the happy couple had in mind, but they would reflect dress of that time. For dress that’s economically and socially between the first two pictures, check out movies including or about Goya.
Going as Don Carlos would be a big hit back home, pity I think it would be a pain to explain in Norway.
I hear dysentery was big back then.
(j/k - sounds like a cool idea)
I haven’t dealt with any of these folks (I’d sew my own) but here are some more places to try:
In US
http://www.ushist.com/victorian_mens_clothing_f.shtml
http://www.gentlemansemporium.com/victorian-clothing-guide.php
In UK
http://www.agesofelegance.co.uk/uniforms/victorian.htm
I’m sorry that I don’t know how to reset Google to get Norwegian sites. I found those sites by googling “Victorian era mens clothing”. Those were on the first page.
You can also try googling “Victorian clothing patterns”. If you give a tailor (a REAL tailor) a pattern or even photos, they should be able to copy it.
Depends on what you’d eaten. Sometimes it was just normal sized.
Also, try searching on Pirate costumes. Many of the Captain’s coats and especially the waistcoats are just the sort of thing you need.
Thanks a million, these links are just perfect and exactly what I was looking for! I am almost certainly going to order something from this page:
Both Professor Babcock, Man of Science and Royce Bentley Stanwyck III, Bon Vivant look great and would be a lot of fun, but many of the others look good too! Now it’s suddenly hard to choose just one! 
Thanks Sandra Battye, and everyone else!
Hi, Eivind! The 19th century is a really exciting time for men’s clothing, despite what people say about it all being black wool and white shirts. Really loud plaid trousers were popular from the 1830s to 1850s, for example, and the Cunningtons describe shirts embroidered with pink boa constrictors or printed with pictures of opera singers (probably half-naked!) from the 1840s in The History of Underclothes. Now, those probably wouldn’t be appropriate for a wedding in the 19th century, but since it’s only a Victorian inspired wedding, I say have go wild. Be a fashion victim! It’s way more fun.
As for having a suit custom made, you should know that in order to get something that fits well and is worth paying for, you’re probably going to end up spending more than $500 (US) before it’s all over, and that’s a conservative estimate. Instead of doing that, I’d recommend ordering something from a place like Gentleman’s Emporium, who have an excellent reputation, and then getting it fitted by a tailor at home. Or if it fits well, you won’t even need a tailor!
I highly recommend getting the high-waisted pants and wearing them with suspenders/braces. That goes a long ways toward getting the right look of the era, since pants came far above what we consider our waists today, and the suspenders keep them where they’re supposed to be. And a top hat! You need a top hat.
Wow, very nice!
Now you just have to figure out where to wear it after the wedding.