Oh I'm sure there are some and I suspect that someone will point them out now that it's been mentioned.
That will just distract from your point which I agree with that:
There aren't many abandoned open source projects for Maemo where source code isn't easily available. Certainly not enough to warrant the resources to design, develop, install, and maintain what would in essence be a YAR (yet another repository )

...as been said many times on this board, feel free to post your own list.

BTW, I think you may be misguided based on some responses.

There may not be many apps abandoned without source code available however, I agree that there are many apps that appear abandoned non the less.

Perhaps energy could be better spent developing good training material that casual users can be directed to so they can post patches and/or make the changes they want in existing apps.

...what is reported may not be due to lack of access to the latest source rather it may be lack of access to a way with which to encourage continued development.

To that^ I say; allowing or encouraging developer links to pay-pal or other donation sites does wonders.