Ok time to chime in (again) on this hopefully to provide a little more information for all the people that are still interested in this topic. First though, the search feature still has lots of info on this. A few browsers that were reported to work in aku 3.3. Some reported netfront and opera as working, but didn't leave details. I gave a detailed write up quite similar to yours but using minimo (free, but slow). The browser identity always seems to be the first thing tried, but has not worked for PIE.
Here's another link with some info for people:
http://www.ppcgeeks.com/picture-mail...ht,mms%2A.html