I find myself looking at old messages and scroll or use the search, but when i get a new message I have to scroll back to the top or change my setting to show only new messages. Is there a key combo that will take me back to the top?

't' or maybe 'u' for first unread message if I remember right.

"T" will take you to the top or newest message. "B" will take you to the bottom or oldest message. Ingenious isn't it?

thanks guys, each time I've had a question its been something so simple it's so obvious. I have to break myself of windows mobile and Palm thinking.

Some more good shortcuts here:
Tips and Tricks - BlackBerryFAQ