I was in the same boat as you, with a big laptop killing my back, until I bought MiniMe, aka an HP pavilion dv1000. It's a great travel computer: light, small, sleek, great screen, wifi, even has a little remote control (stores in the PCMCIA slot when not in use) for use with DVDs and CDs. And two headphone jacks, so you can watch a movie on DVD together with a travelling companion if you like.

I also like the 6-in-1 card readers on the HP pavilions, which are handy for copying photos from a digital camera card, or using an SD card to move files between the laptop and my PDA.

I bought my dv1000 for about $1100 about six months ago; I saw an ad on TV the other day for them for about $895.