Also, another laptop that is on sale(that I use) is the VAIO PCG-SRX87. Much like the picturebook, on sligthly larger. Comp USA has them on sale for a very nice price. 20 gig HD, 256MB Ram(expandable to 384) Also comes with Sound Forge loaded on the comp.
If you are into Macs, iBook G3/700 MHz is a nice product
I'm using the USB pre infront of mine, nice sounds so far. Now I'm just saving for 480's
Battery life can be a problem. So, always keep that in mind !