Hi David,
We built xui js for a project that was targeting iPhone and Android
--- we didn't use a spec other than the test suite we wrote for the
framework which you could pop open in any mobile web browser to get a
feel for the capability.
Dojo has a custom mobile webkit build. I have not tried it personally
but I do know it is larger than xui and the mobile webkit javascript
cache which is less than ideal for our purposes.
Interestingly: we're working out the details for full S60 support
including animations. Are you working on a project that requires this?
Cheers,
Brian