Android 2.2 Froyo running on the HTC HD2, an HTC Desire HD ROM ported to the HD2, and now it's looking pretty legit that some folks in China have got Windows Phone 7 running on there too! What a versatile little bugger that HD2 is. Take a look at videos of the magic courtesy of XDA forum member Samsunguy - what a nice dude!
MIUI ROM. Currently wowing with its combination of slick icons, straightforward multitasking and general visual niceness, the new ROM completely overhauls the UI. More information at xda-developers together with download links, and the Android Community guys are already talking about MIUI here. Anybody tempted? [youtube Or-9T44Bt7M] [Thanks Ewdi!]