Are you hosting the printer and other shares on a main desktop or everything directly to the router via wireless?

If you have a host machine running Linux then I suspect your easiest route at present would be to mount volumes on there and tunnel through.

UPnP is a potential option here, especially for windows i suspect.The easiest long term option would be a NAS device and rsync up to it.

If you need to go direct then have a look at progress on Wizard Mount.

Just an after thought, what about using a webserver for sharing too.