Here's a quick rundown:
but also you can include C or C++ libraries (plugins) with the use of the PDK so using OpenGL the creation of 3d apps and games should be a snap for any decent developer (still a bit over my head though)
So with webOS 2.0 that's coming soon, web developers will be able to write services that run on webOS devices using the node.js runtime environment.
Here are some more details on webOS 2.0:
If I had spare cash (which I don't - who does these days?) I would get me a palm device and get programming..... but then I'm still waiting for my Android device as well !!
P.S. The webOS emulator uses virtualbox so should theoretically be a lot faster than the Android Emulator which I found extremely unusable. But I haven't tried the webOS emulator yet so it's just speculation.