So you've still got a Motorola Milestone lying around, yes? How would you like to upgrade to a much nicer phone without having to toss even a dollar out of your billfold? You can right now if you hang a left over to the thread on XDA Developers made by edgardastro, an avid developer of hacked items. This brand new ROM of Android 2.3 Gingerbread that edgardastro has baked up is based on AOSP, and there is still quite a bit of development going on, so don't expect a perfect build quite yet.
This is the first release of this ROM, and it's by no means a completely finished product. If you'd like to help in the development of this build, we're sure edgardastro would appreciate the help. Find all instructions for the installation of this hack in the following XDA Forum thread: 
[Via XDA Developers Forum]