Interesting, I had sort of forgotten about the 770 (sorry!)

I'm not sure, off the top of my head, what the support lifetime of the product is (and therefore whether repos would continue to be hosted on maemo.org, but then again it's a community site so we could always add it back in if it's missing).

There may be other issues with the infrastructure of the Extras repo and submission process which don't work with the 770 toolchain, etc. It would be worth posting this question to maemo-developers so the right people see it.