I can't run AIM, Web, and Music at the same time.

Problems with web:

Page loads but freezes for 20secs before I can even scroll (sometimes it freezes and does not respond.)

I use Opera but it seems to me that Opera takes too long to load regular mobile pages (m.___.com)

What is happening to my phone? Im frustrated, but I still can't let go of my N900.

HELP!