Looks like a fun project, but without a PCB or plans it's much like window-shopping. :)
I'm working on putting up a web for my project though. I think I've figured how to fit a 16mb simm in my 520 STM I intend to use as a gineapig for the project, so I might include that in the project. Although it feels like it should be a different project/PCB for that.