My favourite section is undoubtedly the Apple Devices forum (http://www.mobileread.com/forums/forumdisplay.php?f=170
). It has lots of good information and some of the developers of ebook reader software are actively participating there which is fairly useful.
It could be even better if there were less generic topics, though, which do not really concern (mobile) reading at all (e. g. jailbreaking, mobile games, etc.). Of course, such topics have their merits as well, it's just that there are more appropriate forums for such things.
A minor improvement could be to stickify http://www.mobileread.com/forums/sho...d.php?t=154061
which is about a Wikipedia article which contains a lot of information about the different ebook reading software for Apple devices. (I've tried to get feedback about stickifying it in the feedback forum but, unfortunately, got no, uh, feedback.
All in all, MobileRead is highly useful and one of the few sites that are always open in one of my browser tabs. :-)