It looks like things are settling down again. My main rankings are back now but I've lost a few pages from SERPS but that's no great concern to me yet. At least I haven't vanished totally which was making feel a bit sick.
Major PR movement on our sites (down) : July 26th 2008 CST Dallas TX USA SERPs have moved up though????
No changes as of yet. Some of my sites still first page in SE's and PR same. Predicted good pr on some but cannot go by prediction tools much