Here is the KDE 4 release schedule for the next couple of months, as shared this morning at the KDE 4.0 release event keynote by Aaron Seigo. KDE 4.0.1 will be released later this month with minor maintenance releases coming every month. KDE 4.1 is planned for release this July with much polishing since KDE 4.0.0.
January - KDE 4.0.1
February - KDE 4.0.2
March - KDE 4.0.3
April - KDE 4.0.4
May - KDE 4.0.5
June - KDE 4.0.6
July - KDE 4.1.0
August - KDE 4.1.1
etc...
For those still sticking to the KDE 3.5 branch, KDE 3.5.9 will be released next month.
