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There obvioulsy the same accounts. Posted 2 minutes after. lol
Guys there are no beta keys for cataclysm, the only way to get in was if you signed up for the beta via your battle.net account. And if you were selected you would have the catalcysm logo in your games section on Battle.net, no codes are given out, you just download the client and log in using your battle.net login details. So don't be stupid and give this guy your cash.
Actually people won Beta Keys from competitions on different websites, plus competitions hosted by Blizzard themselves. Also its likely they were given out for various things at Blizzcon. So yeah there "IS" keys out there.
In regards to OP actually having any is anyones guess.