I was wondering about this too. Somebody replied me that it DOES mean accepted, and also many others told me as well. Although I don't feel that secure about it lol. But yeah, according to many others, it means accepted
I know it's hard to believe after all you've been through with this process, but "offer made" means they are giving you an offer for the class of 2011. Congratulations!
Maybe we should suggest that next year they say, "You are accepted. 100%. Without a doubt. You are in!"