I'm running Redhat and Mandrake. I compiled the 2.6 kernel but didn't notice any difference over 2.4, speed seems about the same.
Been talking to a buddy at IBM, there's some talk of releasing the the OS/2 desktop to to run on Linux when Warp dies. OS/2 is pretty much dead except for a handful of legacy app holdouts.
Don't know if this is going anywhere or if it can be done without a ton of work but it's an interesting idea, OS/2 desktop is old but way better then KDE or Gnome and it seems a shame to wasts the code.
Al