Ok, I’ll play. I still consider myself a “new guy” here - I think very few of you know me. so guess away.
Now if I can get the link to work…
Grrr
Ok, here’s me. There may be a tiny clue. 
I know i’ve mentioned my age a few times but I don’t think i’m friendly enough with anyone that they’d remember it particularly.
I’m incredibly bad at guessing, so please don’t be offended or think i’m a good judge.
DrCube, I reckon you’re 26.
Sublight, erm… 32?
HazelNutCoffee, maybe 23 but definetly hot.
Noone Special, i’m going to say 35 and add that i’m hoping to grow a beard like that.
Gail, who’s impressively smiley, i’d say… 39.
Octalcode, i’ll guess 46, and also ask what your arm tattoo is of?
HazelNutCoffee: your cat looks EXACTLY like mine. They even have the same tag.
Age: you, early 20s. 22? Cat, oh they hide it too well.
Using Tesseract’s new list, with the relevant additions:
DrCube – 27
bbs2k – 28
Sublight – 29
HazelNutCoffee – I know your age.
Gail – 42
Octalcode – 45
Revenant Threshold – 22 or 23, if that was in June, I guess…
Noone Special – he looks like he’s not a day over 25; really 
More seriously – those guessing my age, are you taking into account that the picture is about 2 years old (i.e., adding 2 to what you think)?
Nope, not close.
It’s a Dollar Bill with Harley-Davidson wings.
Days long gone…
I’m very bad at guessing, so I’m just going to post pictures.
April, 2006.
Same day.
Totally unhelpful picture from March 2007.
More recent pictures all make me look fat (but only because I am).
I scrolled through this thread from the beginning looking only for links to pics, so I’m guessing on everyone even though you may have revealed your age in a later post. Sorry if I missed anyone as I scanned.
tesseract: the kind of 45 that is frequently mistaken for 35
Helen’s Eidolon: 23
ErinPuff: 19
SSGSchwartz 38
Robot Arm: 29
Aesiron: not sure which one, but about 30 regardless
E. Thorpe: 35
Hal Briston: I’ll say 37, but I admit to being influenced by remembering a few posts
Drain Bead: 25
Hockey Monkey: 34
Queen Bruin: 29
fisha: 32
Miss Purl McKnittington: 24, mysteriously transformed to 30 with the pincurls
DiosaBellisima: 30
Dr. Cube: 28, and yes, your baby IS adorable
Thorough readers of the boards with good memories are bound to know my approximate age, but this is me 4 years ago and this is me 2 years ago. Note the increase in grey hair over two years.
On the whole, I think we are a pretty cute bunch.
fachverwirrt – 27 (correcting for age of picture)
CairoCarol – 45 (ditto). And you missed *my *picture 
:sulk:
I can destroy that notion. Indiana Bones on our polar bear excursion last year in Kaktovik. The Ms. is the blond who’s propping me up.
Oops, missed some.
Sublight: 32
HazelNutCoffee: 26.
Noone Special: 28 in the pic, so 30 now.
Gail: 40
OctalCode: 49
Revenant Threshhold: 24
fachverwirt: 30
You are all younger than me, dammit.
Okay, now THERE’s a group I feel an age kinship with. Whew. I was beginning to think I was the only poster over 40.
What makes you think I’m over 40? Is it the hair? Hey, it was a windy day and…um…I was covered with snow! Yeah, that’s it, snow…crap.
At least I’m not as white as this guy.
Are you actually in Cairo? I spent several months there working on the new embassy back in about 1985. Lived in an apartment building owned by SwissAir overlooking the Nile.
That debonaire look the whippersnappers can’t hope to achieve for a few decades, of course. 
I was in Cairo until November 2007.
I’m terrible at guessing people’s ages.
early 20s: Miss Purl Knittington, Diosa
mid 20s: Helen’s Eidolon
late 20s: Drain Bead, Aesiron
early/mid 30s: ErinPuff, SSG, Robot Arm, E. Thorp
mid/late 30s: Hal Briston, Hockey Monkey
… Hm. For some reason my browser is acting all weird and won’t allow me to open links anymore. I’ll be back with more guesses later.
Hah. My friend’s only 23 and would probably be amazed that anyone thought she was thirty. I know I am.
HazelNutCoffee, I will buy you a cup of your namesake for your complimentary guess.
SSG Schwartz
Sounds like fun. I’m in, too! Guess my age from a photo taken five minutes ago, just for this thread.
It’s not the picture, it is my dimming vision. Happens to us oldsters.
ChefGuy – 50-ish
Q.E.D. – Early 30-ies.
I’m going to sleep now, so I’ll disclose I’m 44 (was 42 in that picture) – so all guesses were low, some spectacularly so (Carol, thanks! 
)