Now that KDE 4.1 has been officially announced, I don’t feel I’ll be stealing any thunder to tell you that Arch Linux has had KDE 4.1 in [extra] (the main repository for non-essential software) since yesterday evening.
The KDE 3 desktop has gone (the maintainer of the KDE packages has no wish to attempt to support both), but kdelibs 3.5 has moved to kdelibs3 and several KDE 3 applications (such as Konversation and K3b) that have no stable KDE 4 releases or equivalents yet are still available.
One of the main advantages of Arch’s “rolling updates” system means that, once a stable and usable version of a piece of software is released and has been tested, it can become a part of the distribution immediately without having to wait for the next scheduled release.
Personally, I’m running trunk (and have been since plasma was vaguely usable sometime last Autumn), but it will be useful to have a basically vanilla 4.1 release to test bug reports on. And it also means I have fewer dependencies to compile myself.
So: much thanks to Pierre Schmitz for his work packaging KDE 4.1 in time for its release. This is one reason why I love Arch so much.
 See comments for info on kdemod [/edit]