Man, laptop shopping is a bitch...
It will run Windoze (for the games). (& dual-boot linux, of course)
Main applications: portable DVD player, websurfing, games.
(Since I want exposure to 64-bit environments for development purposes)
Core2Duo or Turion-64/X2
Portability: Having previously owned a purported 7lb portable (that felt more like a 10lb portable), the target weight will be ~5.5lbs or less.
Indirectly, this means I'm aiming for a 14" (or less) widescreen
Good battery performance: 3+ hrs
Pricing: Not over USD $1050.
The Sony VAIO VGN-C150P/B probably comes closest to my ideal machine, but it is list price $500 over what I am willing to spend.
Right now, the Lenovo 3000 N100 will probably be what I pickup, but boy, I hate that Intel graphics chip.