Lenovo's S10 is an excellent netbook that adds a useful extra to the usual mix: an ExpressCard expansion slot. Otherwise built around the standard loadout of 1.6GHz N270 Atom CPU, a gig of RAM, 10.2" 600-line display and Windows XP, it comes with a 3- or 6-cell battery and is $350 at Amazon. There's also a 4-in-1 card reader and a 160 GB hard drive. It is 9.8" long, 7.2" deep, and weights 2.6 lbs with the 3-cell.
Particularly good is the keyboard, despite the right-shift key being to the right of the up arrow, and the quality of its squared-off construction. It's attractive, if a little large compared to some competitors, and comes in unusual but conservative colors like indigo and burgundy. As reviews, it was bloatware-free and worked as well as anything we've tested in the category. It reportedly runs OSX well, making it a good choice for people who can't wait for Apple's expected netbook.
Though recent netbooks have better specs, it's easy to recommend the S10. With prices hitting the floor and the S10's quality in every respect that matters (except for that damned shift key), it's a good choice that embodies and upgrades an old agage: you'll never get fired for buying Lenovo.