This might be the ultimate tool for the smartphone freak in you! Folks over at XDA-Developers, who are known for their awesome applications and mods for Windows Mobile and (now) Android based devices, have come up with their latest contraption - the Gen.Y DualBOOT.
Now, if that name has had you stumped, allow us to simplify things. Gen.Y DualBOOT is a tool designed for Windows Mobile (6.1 and 6.5) devices that will enable users to dual boot Windows Mobile with Android OS - on the same phone. All the Gen.Y DualBOOT does is to add an option at startup asking you to choose which OS you want to boot to. It works with all Windows Mobile smartphones that have WVGA, VGA and QVGA screen resolutions.
XDA Developers forum has a thread dedicated to Gen.Y DualBOOT where users can learn more about the installation process. If you happen to own a reasonably capable Windows Mobile powered handset, you might want to try this out.