Hi,
I can do your app very easily as i have worked on BlackBerry and Android from last 4 years. I can give you this app with a great quality on a small time frame.
I can deliver everything except Push Notification part as i never did for blackberry but i can try. Also i will support all the blackberry 6.0, 7.0 and 7.1 devices.
Thanks,
Arindam.