Nimblex sub100 was released yesterday. From the release notes : "It was just released - the smallest live CD in the world with KDE. It's just under 100 MB and gathers together Linux kernel 2.6.21, KDE 3.5.7, xine media player, XMMS, GIMP and other software. NimbleX sub100 is most likely the fastest distro to boot in KDE and from the tests that where performed so far the fastest boot time was 35 seconds. You can get it from nimblex.net and use it as your portable OS. ... This is not a new version of NimbleX; it's just a different edition that has the technology that will be at the base of the next version."
Their server did appear less capable though.
Best
A. Mani