Some of you might already know, WhatsApp has been available on Windows MarketPlace For Mobile since last Saturday, but unfortunately, it is only available for Windows Phone 7.5 (Mango) users. Most of us, the “general public” are still on Windows Phone 7.0 and are eagerly waiting to upgrade to Windows Phone 7.5 which I think will be released this week if not the latest next week.

The official word came from WhatsApp’s blog post:

On Saturday September 25th, after months of hard work, our Windows Phone client went live in the Marketplace!

WhatsApp Messenger for Windows Phone is available to those running version 7.5 (Mango) release on their device. We are sorry if you don’t have Windows Phone 7.5 yet, but very soon all of the current Windows Phone 7.0 devices will get upgraded to 7.5 and you will be able to download and enjoy our app.

The release of WhatsApp For Windows Phone 7.5, brings the support for WhatsApp across 6 different platforms:

WhatsApp Blog: Windows Phone = SIX