One thing Microsoft was heavily blasted for over Vista was how long it took to get it out the door. Five years between OS releases is a long time considering Apple's 1.5 year turn-around on OSX iterations, and even Redmond's own history (95, 98, 2000, 2002) with desktop OS versions. This time though, Microsoft has no intention of letting things go that long before the next version of Windows.
Technology blogger for ZDNet, Mary Jo Foley has a bit of information on what this interim Windows release will be. Codename "Fiji", it's not Windows Vista SP1, but it's not a big jump forward in technology either. It will be the interim release between Vista and "Windows Seven" (formerly codename Vienna). It looks like it's claim to fame is going to be as a media center OS.
The question becomes, what will Microsoft do with the Media Center capabilities built into Home Premium and Ultimate? Will they be abandoned in 2008 when Fiji rolls around? Will we really need a stand-alone Media Center edition of Vista when there are already so many specialized editions of the OS?
EDIT: Original story unclear on interim status of Fiji.