vBulletin 5 for mobile application
 

vBulletin developer had to add the notification feature for android, IOs, blackberry application. the notification that I mean is the flashing LED notification.
this will be very useful, the user will know if someone reply their post, send them message, friend request, etc.
as soon as they see the flashing LED notification they will find what happen, people always curious.

I suggest to make application for blackberry too. because in my country there was a lot of blackberry users. :)