Android Technical just published "Windows Phone Android", a windows phone metro UI launcher for android. The lite version is now in the Android Market.
Lite version include:
Pin to front page tiles
remove from front page
dark and lite themes
4 accent colors (Blue, Green, Red and Orange)
limited messages (on message area at the top of the screen)
status bar with mobile signal, wifi, bluetooth, battery status etc.
informational tiles, animated screens, status messages and other features will be included in the regular versions.
At the end of the day, if you really want a Windows Phone, you should go get one. You can get one here from Microsoft.
Side Note: You may choose not to install it as a launcher (choose default home as launcher) and the application will act in standalone manner.