We have also been pretty busy locking down Katmai to get CTP6 (aka known as the "February CTP") out the door and working bugs. I recommend that people head over towards the "Katmai" forum on MSDN for Reporting Services if you have any questions. There are lots of people there willing to answer questions and otherwise help out.
So what now? I owe a part two post on some of the memory management stuff we are introducing in Reporting Services 2008. I'm getting all of the info put together now, and the post should be up shortly.