One of the reasons for moving to this new format for our website was to make it easier to take what YOU want and turn it into new features quickly. 

Something that's been asked (and to be frank, not hard to create) is a place where you can let everybody know about item you have for sale. I think it could work the other way too - somewhere you can say "Hey, I'm looking for a Nikon fit doogle-hopper. Anyone got one I can buy?"