3.4 is the newest, but is still beta and has some odd problems. Technomancer was updated recently so all the apps that matter should be up-to-date.

There are some other remasters with the driver you need- ClusterKnoppix, Kanotix, and Morphix as well as a 3.3 version of ordinary knoppix (2-16-04) which had the GPL forcedeth nforce driver.