I just pre-ordered, and am seriously stoked to have a chance to participate in the beta. And I don't use the word stoked very often, if ever.
If any of you folks have pointers for someone just getting into the game, I'd love to hear them. I realize everyone else is just as new to Beta 3 as I am, but I know there's a pretty good sized set of knowledge about the basics of starting out that I'd appreciate the opportunity to tap into.