OK, so this really should have been announced before, but due to a combination of factors including my being offline for 2 days (and still on a very unreliable connection), it didn’t get announced.
Today will be the first of several days focused on finding bugs in KDE PIM 4.1 alpha/beta releases. KDE PIM (which includes Kotnact, KMail, Akregator, KNode and several other PIM apps) has not yet been released with KDE 4, and these days aim to spot as many bugs as possible in them so they can be fixed before the final release.
In order to take part, you will need a copy of KDE SVN trunk, or an aplha/beta/snapshot version of KDE 4.1. If you don’t have any of these, there is a Live DVD (about 900mb) created specially so you can join in with the Krush day anyway. Come and join us at #kde-bugs on irc.freenode.net, and look at the Techbase page for where to detail bugs you find.