What do you have running on your device, my 8820 leaks no memory. After a month of not pulling the battery I have 34.4, pull the battery and have the same.
Be patient as the 9000 is on the way and rumored to be released next 2nd quarter with 1 gb of memory, over a 3 mp camera, WiFi and 3G.
BlackBerry 9000
No time to give up on RIM!