You should have gotten free stuff in the bag they give you with your membership bag when you first go in, other free stuff is usually available from the publishers booths in the dealers room, and most conventions have a "free table" where you can pick up all kinds of promotional stuff. Sunday afternoon is a good time to hit up the dealer room, because sometimes you can get a deal from people who don't want to pack everything up for the trip home.
@2 & @3 thanks -- I snagged my first freebie today after the guild panel (poster of Tink) and will try to make my way through the crowds today for other stuff.
Thanks for the plug! The "You Are All Weirdoes!" shirt was a huge it at ECCC. It's all but sold out. Check my web store www.snakeoilclothing.com for more designs. Cheers -Ben Walker
@1 visit the website before you go and also look through the program guide. You should be able to get a good idea where all the good schwag is.
--Black Knight