Regarding the usability of the software on the forum, it seems pretty good so far, with only a half-dozen posts under my belt.
I did have one oddity where I quoted in parentheses, and it became an emoticon ("like this"). But the wysiwyg editor is pretty smooth and lightweight.
I am now a big fan of web apps with a lot of typing in fields that implement autosave, such as Wordpress now has. That would be a good feature to add, especially since we are logged in already.