Since going open source, HP's webOS platform has been ported to a handful of Android devices, including the Galaxy Nexus and the Nook Color. The most recent addition to this niche club is the ASUS-made Nexus 7. A dedicated gesture area, working keyboard, brightness adjuster, and Wi-Fi connectivity are all up and running.
Palm expatriates may by happy to see their old friend webOS again, especially if they have a a spare Nexus 7 kicking around to get the build running themselves once it's made publicly available, but as you can see in the video, things are still very much in an alpha state.
It's hard to say exactly where aspects of Open webOS will proliferate through the mobile ecosystem over the long run, but looking at experiments like this, it's hard not to think that Android might be one of those places. Any old webOS users here? Who would be willing to try to bring it to their Nexus 7?