I'm looking to buy one of the new dual core android phones. I don't know how to check what is available and also I'm wondering if I can find things here that haven't been officially released in Thailand but have made their way here. Is there a website I can check? I live in Bangkok so can also visit places. Thanks.

They haven't been released anywhere in the world yet.

http://www.thaimobilecenter.com/home/index.asp

or

http://www.siamphone.com/

Check these websites. If available it will show a price.

I suspect the Samsung Galaxy S2 might be the first generally available model that meets the OP's requirements. Not sure on the official launch date, expect one of the big providers here to be the local launch partner as was the case with the Galaxy S, but maybe Q2?

The Motola Atrix 4G is of course available in the U.S. now.

Agree that thaimobilecenter is the best site to check for availability and pricing. Thai social forums, like panthip, also have a ton of mobile ohne chatter worth monitoring if necessary.

Thanks guys. Hopefully one of the good ones comes around or I might end up buying an iphone. I'll wait it out a little though.