I'm a tech in a Verizon store, and the trackball is reason why I'm not in a rush to get the current Tour. I did figure out how to clean the trackball, even though it's mounted in the device.
I take a sticky note sheet, and slide the corner into the crease between the screen and trackball.. I work it like floss, then I go into the crease above the keyboard and do the same. A couple bursts of compressed air in the creases makes things more loose, and I've yet have anyone return due to that not working.. I also have a small brush I use to get in there, very fine bristles and it works better than the paper trick..
I will be upgrading to the Tour2 once it's out..
