Next week I plan to take the dive and install Vista on my work laptop. Few reasons for it
1) I finish my current project Tuesday so I have a little bit of extra time next week while I shuffle to a new project.
2) My current work requires me to use .Net 1.1 and thus VS 2003 while going forward I see no more VS 2003 in my life ;)
And then I saw this post today about how SP2 for SQL Server 2005 should be out Monday which means proper Vista support (from what memory serves SP 1 doesn't have it). Must be sign to do it :)