The Yanks did it on .com. Someone just started a thread asking what evrybody looked like and almost everyone replied. Photos were linked from individual photobucket, or similar, accounts and it grew to many pages. It would be easy to include bikes, just link a different pic. The only problem is when someone deletes thier photo from the hosting service it becomes a dead link in the thread.
Christain is right about hosting the photo's on the board. It take huge amounts of space, and bandwidth, and very few forums do it.
I'll start. Heres mine.
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Not the prettiest, but it's mine.