We just pushed the second service pack out of the door. Again it is mostly a maintenance release addressing the reported issues. Keep in mind though that the service pack is available only to customers who own a commercial license. The open source version (and codeplex project) will get updated only on major releases. Still should you discover a critical bug write in the forums. We will most likely attach a binary-only version there.
The regular bunch of fixes – the complete list can be found in the release notes for service pack 2 page. We also improved the grid editing examples quite a bit due to popular demand. Also the documentation has been enhanced with more troubleshooting content (it is still not live though at the time of posting).
I hope this helps!
Atanas Korchev is Team Leader in Kendo UI Team