You might have been playing with Android before and seen it running on some hardware... Not me as we decided to focus on iPhone development and have to drop off a bit of Linux for now (just having one brain is not enough to play with all these new exciting OSes). Thus I don't want to bother with Linux kernel recompiling and all the other burden with Linux porting. However, it looks like the latest release of Android can be installed quite easily on a Nokia N810 Internet Tablet: