Olly,

With such a large user base, would you ever consider adding a trading post or marketplace type forum? One user may have a flash or camera bag sitting in a drawer that is completely useless to them while someone on the other side of the globe is desperately looking for one.

There are inherent problems with online trading but I would think in a forum like this, they would be minimal. There are things you can do to minimize the risks.

Sure, I can create a trading forum but the user base isn't large at all, yet ;) you know. It will take a while before the site gets listed on search engines etc. For things like that, it will be at user's own risk of course.

Olly