MobilityGuru has a rundown of several small Intel-based notebooks, “Ultra Lightweights”, including the Toshiba Libretto U100, with a 7.2 inch display and the Fujitsu LifeBook P1510D with an 8.9 inch display (not only that, it’s a Touchscreen!), as well as few larger notebooks.
We normally focus on PDAs, but some of these laptops these days are under three pounds, and a 7.2 inch screen with an actual keyboard (albeit cramped) could make for a useful platform for a genealogist who’s just not happy with a PDA, but doesn’t want a large laptop.
Source: Small-Laptops.com