HTC HD2 is a wonderful piece of hardware. But if you thought Windows Mobile 6.5 made the software feel a bit old, here is some good news. Folks at the XDA Developers have succeeded in porting Android, Ubuntu and other Linux platforms to the HTC HD2.
Of course, I am nowhere near technical as these people are and will not attempt to give you a step-by-step instruction. But here are some caveats before you hit over to the XDA forum. The procedure is risky and can void your warranty. Besides you run the risk of permanently bricking your phone and so please do proceed with caution.
Still feeling the urge? Click to read the instructions you may need.