Been waiting for Mango so I'd be able to use WhatsApp again. Something I ditched together with Android . If WhatsApp decides to sell it instead of making it free, die la. WHY CANT MALAYSIANS BUY FROM THE MARKETPLACE

Hahaha troublesome la. Thanks though. I'd have to reset me phone to use the newly created Windows Live account, don't I?

I had this problem too, restarted my computer, Zune everything and nothing seemed to work although I changed the region lol.
Then I decided to change the system locale and voila- it worked!
I went to Control Panel > Regional and Language > Administrative and clicked on the 'Change system locale..' button
and changed it to Singapore.

Worked for me hahah, why dont you give it a try

Can't wait to see a WP7 phone displayed on the WhatsApp homepage
http://www.whatsapp.com/

Not yet in Malaysia

Whatsapp is only supported on Windows Mango phones.
If you have any version other than Windows Mango, you won't be able to see it

Hahah yes but it's coming relatively quick. We'll have it in 2 weeks max. That's what Microsoft said

Put your country as Singapore and just google up any valid Singapore address.
Refer here for more information;

http://forum.lowyat.net/topic/1692471