Again...do we need hundreds of "iPad 2 stock questions" in this forum? Use the SEARCH on top right OR google it. If you want one, GO TO THE STORE EARLY BEFORE THEY OPEN. Don't call, they are pissed off with "do you have iPad 2?" questions.
I'm afraid 503 is right.
The only sure way is to be 1st in line.
So get there early. Also if not successful the first time used this as a gauge when to get there.
Your profile says your in Hong Kong you can walk into basically any electronics store and they will have them. There will be a premium though as they will be from the grey market.