Been using my TC1100 for few months with 1.5GB of RAM. Had promised to say something so I just drop a few lines.
It is definitely more responsive, no more 'hanging'. I didn't use ctrl+alt+del as much as I did before(far far less).RAM seems to be not a problem any more if any does occur when I have lots of program running at the same time.
One thing for sure, Centrino 1GHz is definitely not enough for my appetite. Things run smoothly but still slow. I really can't wait to see a tablet with 64-bit processor. I guess I have to wait a bit, will start saving money now =)