I can now mount the phone wirelessly over SSH in Ubuntu (or anything else) and drag + drop my tunes, videos, files, etc. over to it

The Ubuntu User Guide has instructions for getting this done.

…there also seems to be instructions there for getting iPhone2.2 working with ‘normal’ syncing apps on Ubuntu. Going to try that out now.

Not *too* much else of interest from the jailbroken app store, to be honest… though InteliScreen is good — displays upcoming calendar events and new mail summary on the lock screen…. but wireless transfer was the killer app for me. My fenestraphobia has kept me from changing my tunes for too damn long.