From the BB boards at EJ:
For those looking to get a beta key via GameStop, use thie code 25OFF to get $25 off a $100 purchase. The CE sits at $99.99, but they sell all sorts of old games for $1 that you can add to your cart to make the key valid.
I've no idea if canceling and re-upping orders will fuck your orders up or anything though.
[Edit:
DOESN'T WORK for the collector's edition. I called Gamestop and asked, and apparently Blizzard directly requested that this code doesn't work on SC2 CE anymore. It works for other stuff though, and for the regular SC2. SC2 CE will still count towards the $100 as well, just won't be discounted by it].
