I was bored and tried to make a compatible with windows 7 icon in Office 2010, it turned out pretty well so I decided to finalize it in photoshop and release it, because i didnt find any quality logos, just this crap: [link][link]
Anyway this is just for editorial purposes, feel free to see how it was done PPTX and PSD files included, also 256x256 and 512x512 icons.