An alternative is to use an ethernet cross-over cable and just use standard file transfer methods.

Or perhaps someone will write an os x driver to take advantage of usb-usb (aka usb bridge / networking) cables that work for PCs.

http://en.kioskea.net/faq/sujet-345-how-to-connect-two-compu...

The advantage of these solutions is that you can work with other non mac os x computers.