Rewritten ReiserFS 4 Promises 2-5x Speed Increase
An anonymous reader reports that version 4 of "ReiserFS will be released in first quarter. Complete rewrite will support Atomic writing. 2-5 times faster. File corruption will be a thing of the past. Lindows.com is paying for part of it."
Distros don't offer it during installation for a few usual reasons:
1) no mainline kernel acceptance
2) known data corruption issues
3) Hans Reiser himself has said they're beta and not quite production yet, but will be soon
As another example, Lindows also supports KDE-Look (a KDE desktop theming site) which IIRC couldn't pay for its hosting until Lindows sponsored them.
Anyway, it's nice to know that a pay-only Linux distribution is still contributing to the community (though I do not use Lindows either).