I’m a wedding photographer, and this is where I would start. What are you looking for in your wedding pictures? I personally would start with referrals from your friends if you don’t have a really strong aesthetic preference.
If you shoot me more specific questions, I’ll be happy to answer them openly and honestly.
Personally, when I look at photographer’s websites, this is what I want to see: portfolios of complete weddings, not just a “best of collection,” so you have an idea of what to expect. I’d like to see at least four or so galleries like this, in addition to a “best of” collection. I don’t want to see the portfolio be mostly detail shots, but that’s because I’m very documentary minded. I want to see clean, well-lit portraiture that looks natural. I want to see story-telling images. I want to see a diverse selection of pictures that show me the photographer’s range and the variety of images I would expect from a wedding day.
But that’s only half of it. Beyond that, you want a photographer that fits your personality, as you will be spending the bulk of your day with them. This is where referrals come in, as well as making sure you meet several photographers in person (or perhaps on the phone) before making your decision. You want a photographer that is responsive, prompt with returning emails/phone calls/etc., delivers their products on time, etc. You also want to make sure they have a plan in place in case something goes wrong on their end (like a family emergency on your wedding day), and you want to absolutely make sure they have back-up equipment. I have at least three cameras with me on every shoot. I don’t think any serious wedding photographer would ever go out with one camera, but you never know.
I belong to several professional organizations, but my favorite is http://www.fearlessphotographers.com. You can see if there’s a photographer there in your area that might interest you.