Yup - running shubcraft froyo2.2 on my hd2, works perfectly, really quick too. You need to make sure that your radio version and rom are correct versions otherwise it wont work.
It doesnt actually replace win mobile - it runs it instead - you can run either (before anyone asks - android does NOT run on top of winmo - you stop the win kernel and boot the android one up from windows)
awesome, did you have to unlock your phone first? i've never done this before, can it be attempted by a relative computer numpty?