Whatsapp 2.0 lets you set profile picture within the app.

There's a minor update for Whatsapp on Marketplace. Version 2.0 lets you set your profile picture from within the app itself. This feature can be considered as the main new functionality in this new release. Otherwise it's the usual mysterious bug fixes.
As a FYI, Whatsapp is a messaging app that lets you send text, picture and video messages. The app is free for the first year and costs $0.99 after that. I call it the app that wants to kill SMS. However, unlike SMS, Whatsapp requires a data connection. Whatsapp is also available for iOS, Android, and Blackberry.
Download Whatsapp on Marketplace if you do not have it already or check Marketplace notification on your Windows Phone to update.