Linux on older laptops

Hi All, This should start a raging debate! Are there any opinions regarding a good choice of distro for an older laptop? Thinkpad T22 w/384MB ram and Thinkpad T23 w/512MB ram. My only priorities are quick boot times, wireless support, firefox or opera web browsers and a decent word processor that can save files in .doc format. I've considered DSL, but would prefer reiserfs support. Thanks, Curt