We threw up a wiki for beta 2 to experiment with the format (hooray for slaveintern labor!):
(it's named after the e12 icon, which we call "the ninja star")
Or if you insist on being boring, http://www.theexchangewiki.com
If it ends up being a useful resource for the community, we'll see if we can keep it going after RTM. That will only happen if the community gets into it, however, so please go check it out, register, and edit a page to add your favorite tip, link to a blog entry with a useful tip in it, or ask a question.