I posted a similar question over at
www.xda-developers.com and here are snippets of the responses so far:
"We all are waiting for the new rom based like ppc2003 on the .net framework
it is a bit harder to hack the SPV ROM because it is mainly based on the PPC framework, but we have nearly no documentations about the specificities and modifications applied to SPV."
"We've seen that all Windows CE-like ROMs are very similar in structure to the XDAs ROM. However, we presently have little time to extend our work to other devices: we're already spendng quite a bit too much time on this hobby as it is.
Is the SPV still buggy as hell, or have they improved it?"
"for all stuffs concerning SPV have a look at
www.modaco.com, and our french site
www.smartphony.org
There is not much evolution on smartphone OS since ROM 1.45"
Argh.
I was interested in a generic ROM update a al the XDA-Developers special edition ROM 1.1 or 1.2 for the XDA twins.
Maybe if enough of us post a similar request to XDA-Devs they'll consider helping us out? Whaddya think?