[ame=http://www.youtube.com/watch?v=Lcfr9iQkE_s]YouTube - Receive Push Notifications From Your Social Networks With Boxcar - iOS Vlog 169[/ame]
Boxcar is a useful App that will send you push notifications for almost anything in popular social networks and email. You can set Boxcar to send you a push every single time you receive an email even. Personally, I use this for notifying me about new @ Mentions on Twitter. This App will keep you more in touch with your internet life and can send you further into the abyss of "no life".
Check out BoxCar free in the App Store:
Boxcar for iPhone, iPod touch, and iPad on the iTunes App Store