Many people who have bought the $99 HP TouchPad are now looking at alternate ways to port other Operating Systems like Windows, Linux, Android on the system and few anxious geeks have already started working out on porting Android Gingerbread OS to the HP TouchPad and the project with the name TouchDroid is alive and the people behind that are working hard to taste the success.
On the other hand some hackers have succeeded in installing Ubuntu Linux on HP TouchPad and here is the Step By Step Guide For Installing Ubuntu Linux on HP TouchPad.
When it comes to Windows, it is impossible to port it on the HP TouchPad. The hardware of the TouchPad wont allow you to get the Windows ported and even Microsoft hasn’t released a perfect OS to work on Tablets. Hopefully with the launch of Windows 8, Microsoft will enter into the tablet market. Besides the support from Microsoft, there is no strong community support for Windows to fall back on when it comes to porting activities. (we are constantly looking out on porting possibilities of windows Mobile OS 7 to HP TouchPad, we will update you as soon as we get some information)
So finally, the best OS for HP TouchPad will be WebOS and besides that Android & Ubuntu Linux will be your messiah.