Warren Woodford of MEPIS has built KDE4-Beta1 Live DVDs to verify the compatibility of KDE 4 with SimplyMEPIS 7.x.
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KDE 4 Beta 1 is a very early release and is meant for developers, testers, and reviewers. Warren recommends “The release is sluggish, be patient when clicking to launch something. If you look past the rough edges, you will see the beginnings of a world-class desktop experience. If something doesn't work, you could consider reporting a bug at the KDE project, but I would recommend holding off until the next Beta release before submitting a lot of bug reports.” For more information about KDE 4.0 Beta 1 see: http://www.kde.org/announcements/announce-4.0-beta1.php