In short: the community backend should really just accept packages via upload (authenticated, or course), dump them in a common location (/home/aur/staging) and then setup a cronjob to run db-update periodically. This cronjob should also find packages in the db.tar.gz and not in CVS and run db-remove on them.
If we can collaborate enough on this, we could even use the same functionality for extra and core.
Note that the above regarding db-update requires a move to svn at the same time. I do not plan to add special code to deal with CVS
Regarding db-remove: I think is is an _absolute_ requirement that packages be easily moved back to unsupported. Currently the only way is to delete it entirely and re-upload as a new package (losing all related metadata). It's really horrible, and I think contributes to the glut of useless stuff in community at the moment.