Didn't know that. I also don't know what percentage of Freepers post via Blackberries, or iPhones, but I agree that there's a lot to be said for simplicity in some cases.
I use a BlackBerry Storm as my main phone and Freeping works great on that as well. On the other hand, I’m a member over on eGullet and it is almost impossible to post there. A lot of forums on news sites and Parcbench don’t work on the iPhone at all. Never had an issue with FR.
Something else I like about FR is that all the topics have XML feeds like blogs (most forums don’t have this). I built an Air tool that lives on my desktop that streams news for topics and keywords I like. Little things like that are what keep me here. It is like an erector set, very simple in its design but once you see how it works, you can do a lot with it.