Ok, i want to share something, is a simple script to change WhatsApp status, since Wazapp does not implement this feature (yet).

Instructions: WhatsApp inc. implemented a IP-check few months ago, so you necessary need to be under the same NAT in order to get this to work.
Connect you phone to your home WLAN and run whatsapp_status.bat in your computer (sorry, only for Windows). Don't forget to add your country code before your number phone (for example, +34123456789 for Spain).
Sadly, you will see nothing in your client if you check your name, because Wazapp does not refresh the status, but it works (checked )

http://dl.dropbox.com/u/68216150/WAS.zip