We're in an interesting position with Windows Phone 7. We still don't know what devices will be running the OS nor indeed exactly when they'll be launching, but despite that we've already had the opportunity to spend quite a bit of quality time with not one but two separate versions of Microsoft's mobile revolution. And now, if that weren't enough, we've gained access to a series of detailed architectural documents about the OS courtesy of tweakers.net and HTCPedia.com, documents that detail everything from ringtones to device drivers. It's a couple-hundred pages of generally menial stuff, but there are quite a few nuggets of gold to be found in here, and we've dug them out just for you. Click on through, and let's see what we've got.