(Whistler, being the codename for early XP builds, and still appears as such when scanned with tools like Everest. It's the same type of naming-convention that Vista and Server 2008 had for a long time: Longhorn.)
I see there's a beta version of Windows 7 or is this a fake?
It's probably pre-alpha at this point. I've seen people complaining that it's just like Vista.