http://blogs.msdn.com/xna/

Most interesting is packaged binary for people with GSE installed, in essence if you have the developers club and have installed GSE, there is now an installer for binaries apps… Which means at least among the developer community when can now ‘release’ stuff.

I think its definantly clear that at some point MS is going to allow some form of non developer distrubution of XNA games onto 360… its just a matter of when, one more step will open in April :D