A few select Diskeeper Corporation enterprise customers have received Diskeeper 2007 for Vista. The primary reason for the delayed release is due to subtle changes in the Master File Table (MFT). We've addressed these but are being very cautious and testing this heavily (bootime defragmentation). Microsoft also had to make a last minute fix to Vista (made in their RTM build) to address some issues that affected one of Diskeeper's advanced features. I expect (can't promise yet) we should have a broad release for Vista available for download towards the end of December. As I mentioned before, it will be a free update to everyone on maintenance and everyone who has purchased/upgraded to Diskeeper 2007.