Re: Mobile PC
I'd look into a low-end Pentium 4, Sempron, or Turon. I've done basically the same thing with my little laptop.
Compaq has some fairly nice deals on laptops...
Desktop: Athlon 64 3700, 1024M RAM, GF 6200 TC 256M, 2x 80G, 2x DVD-RW
Laptop: Sempron 2800, 512M RAM, Unichrome, 60G, DVD-RW
Macintosh:G4 1.33GHz, 512M RAM, Radeon 9200 32M, 40G, DVD/CDRW
They get me from 0 to 1...