VPC will connect to the 60C/60CS via USB if you are running OS 9. It's not especially fast but it does work. Of course, this is only an option if you are still running a Mac which supports OS 9 booting- Classic does not work with VPC.
One of the supposed enhancements for VPC 7, due out this fall, is for improved USB support so there is hope that it may work again in OS X.