I have been looking at different used bikes for sale and often run into sellers who cannot identify the year the bike was made, or sometimes even the model. Now, there is a pretty good site for identifying old treks at:
This site has a gallery of pictures, and seems very well documented for all except the most recent bikes. Unfortunately (or rather fortunately, depending on your point of view) not all bikes are made by Trek, and I haven't found a good site relating to other brands of bicycle. I named the thread in hopes that others will have links to other brands, resulting in a definitive identification thread. So, how about it wheelmen?
Post a links to your preferred sites here!
-john (proud owner of a used Cannondale of soon-to-be-identified make)