converting python plugins to work with git

I've compiled the latest version of rb from git and things are looking great.

have there been any write ups about converting python/pygtk plugins to
be gtk3 compatible?
i've seen posts about it but nothing with any details on what has to change.

also now that everything is gtk3 will there be a new location for user
plugins? ($home/.gnome3/rhythmbox/?)
all of my user plugins are missing from the plugins menu so i assume
something has changed there.

Thanks