I have Novell SLED 10 SP1 which is basically a supported version of OpenSuse 10.1. It runs pretty well, had to do some tweaking to get the SATA drive working natively, needed the latest nVidia video driver to get any graphics that looked good. It supports 1440x900 resolution without 3D currently. Wireless and Sound have been my biggest problems, I just haven't had much time to troubleshoot. It "thinks" that it has a sound card, but no sound is heard.
Hardware is T61 with 2GB of ram, 1GB turbo memory, 150GB SATA drive, nVidia NVS 140M I think is the model.