i'd recommend OpenSuSE
SuSE, which is still backing up OpenSuSE a lot more then RedHat does Fedora (as the name suggests) has a proven reputation for hardware support; i myself used to be a RedHat fan and tried (very) hard to get every release of Fedora to work on my conifg but never got a satisfactory result for X, whereas with SuSE, the ATI driver installs itself with working defaults :D
)have a Desktop w/ an ATI Radeon 9800 & dual display; nothing fancy, you'd think, but never got it to work on FC x(
you can get the latest stable OpenSuSE release (10.1) from
http://en.opensuse.org/Download (includes advice about installation
a good FTP link: ftp://ftp.tu-chemnitz.de/pub/linux/opensuse/distribution/SL-10.1/non-oss-dvd-iso/SUSE-Linux-10.1-GM-DVD-i386.iso
or, alternatively, use the bittorent, from http://en.opensuse.org/Released_Version
also follow the advice about package manager, on the 1st page (BEFORE YOU INSTALL READ THIS:)
a page which gives generic insturctions, for the X30
http://augustin.vidovic.org/pages/x30/
if you run into problems (and still have a Win32 pc available :-" ) Google for openSuSE "thinkpad X30" adding the troublesome HW / part.