Welcome to the forum. You'll get used to the scrolling after a while. Remember this is a resistive screen rather than capacitive as on the storm, so the feel is totally different.
On the browser, go to Opera mini. It is like 10 times faster and much more usable.
Go here
http://www.opera.com/mobile/download/versions/ and choose international download.
There are a ton of apps out there, but it's hit and miss. You just have to try them to see if they'll work. There are a whole bunch of O2 furums, and some of them have a bunch of tested compatable CAB files that will greatly increase the usability of the phone. Windows is a lot different than Blackberry, but if you're not the kind of person that wants to experiment, then it's probably not for you.
Best of Luck