First of all great thanks to Tarek for this app.

I've read the entire thread but only one person was asking about background internet connection.
On my n9 the issue is about need to run the connection before and manually, otherwise you see "Offline" at the top of the wazapp window and apparently cant send or receive messages.
It's not going online even if you connect to the internet after - if you didnt connect before, you have to quit the application, connect to the internet and run the app again.
If there's no other app running with internet connection (like skype, facebook or browser), the connection shuts down and wazapp is offline again.

Notice that all internet settings ("allow background connection") are switched on. experiencing this problem both with wifi and gprs.

Thank you again! Hope you can help me telling what caused this problem or fix this bug