I'll defer to others on the pocketmac question. In the meantime, you should take at look at
Main Page - BlackBerryFAQ and
Main Page - BlackBerryFAQ.
You really should get an use a media card. You will quickly use up memory on the blackberry and run into troubles if you start adding music, images etc.
Also see
http://www.blackberryforums.com/gene...ee-memory.html.