During weekend, I invested my two free hours to install the Windows 7 Beta (talk about leisure time, there). I was pleasantly surprised that the first public beta already seems so ready. I think that if I can get all my utility programs to run under it, I will probably move directly away from Vista (too many issues in that OS version still). The multiboot Win7/Vista/Ubuntu needed some tweaking — nice instructions are e.g. here: http://ubuntuforums.org/showthread.php?t=1035999
frans goes blog 
Ok, got today also Release Candidate 1 installed. Not much overt changes — works still very nicely.