msn, apps etc wont work without the blackberry add on. '3' wont give you it as they dont deal with berrys. Geet the blackberry add on, its only between 5-7.50 a month depending on your provider and it is very much worth it.
With the BB add on you get: Unlimited internet, unlimited push emails, app stores, all messengers (aol, msn, yahoo, BB messenger, etc). And the BB messenger is like no other messenger. Its exclusive to BB's and works outside the network tariff. What it basically does is, each BB has a pin number, and when you have their pin number you can message them (regardless of where they are in the world) for free! with BB messenger you can also send pics, like MMS for free.
Get it, go on now, dont be silly, you wont regret it! Without the BB package, its just another phone