Before you get all excited, I should emphasize that the source of this news post is a blog. In my defence, it is a fairly trusted one and Bink has already approved it. Fiji has often been referred to as the codename for Windows Vista Service Pack 1. You might as well throw that association out the window. It seems Fiji is actually the next version of Windows Media Center. This is a bit odd for many reasons, even if you don't realize that the last two WMC codenames have been precious stones. Windows Vista's successor is codenamed Vienna, formerly codenamed Blackcomb, but it appears that Microsoft is now internally referring to it as Windows Seven. Microsoft's plan is to release Fiji before Windows Seven, much like Windows Media Center 2005 (codename Emerald) was available before Windows Vista.
This seems to leave us with more questions than answers. If not Fiji, what is the codename for Windows Vista SP1? Why has Vista's successor gone through three different codenames? Doesn't Windows Vista already include the latest Windows Media Center (codename Diamond)? Shouldn't Windows Seven include the next version of WMC? I guess not.
News source: Mary Jo Foley's Blog