I've made an alternate Windows 8 Logo as opposed to Microsoft's current designs: [link]
I believe it fits more nicely into the Metro framework as well as being able to be built into the taskbar which you will see in my other upload. It also stands out and sets itself apart with the Typography while still maintaining the metro look. Also you'll notice it has a stronger link to the Windows 8 Start menu as opposed to Microsoft's logo and is another reason I chose to make it flat. But I believe Microsoft is on the right track by choosing a window instead of a flag.
I've made the new logo myself however the typography of "Windows 8" has been altered by Long Zheng ([link]) and all credit for that is his.