i did use an Acer Aspire One, but the resolution on the screen wasnt very forgiving.
I use a HP6220, 1Gb, 14" Screen, Pentium M 1.73Ghz, and that has enough poke to handle the guiding, the Camera software, and the VNC encryption etc. at the same time, it has 3 USB ports, and i use 2 of them.
works for me !!