The Palm Pre was among the first handsets in the market to run the new webOS. The OS may have never gained considerable market share, but webOS is pretty good and in some respect better than iOS or Android.
Original Palm Pre owners must be feeling left out since developers hardly care about webOS, and thus there is a lack of apps for the platform. However, one awesome Palm Pre developer k3dar - has managed to get Android dual-boot on his beloved Pre.
k3dar has managed to get AOSP build of Android 2.3 Gingerbread to dual-boot on his Pre. Sadly, the port is nowhere near usable and people have even managed to brick their Pre, while flashing this ROM. The touch screen only detects single touches for now, and the Wi-Fi and the hardware keyboard are working properly. Otherwise, Camera, Bluetooth and all other important features are not working on this port.
Palm Pre owners should head over to this thread for more information.
Ironically, most people want webOS to be ported over to some latest Android handsets and not the vice versa. Hopefully, some developers will take this challenge and work on it!