Phone7 Communicating over the teather

Is it possible to have a phone7 application communicate with 开发者_运维技巧a desktop application via the USB tether?

Nope. This functionality is not possible unless the desktop app is running a web service or can recieve communication over HTTP.
There is currently no other way to do this.

It is possible if you decide to sniff the USB traffic and see the model by which the exchange occurs (e.g. phone -> Zune Client). This is what some applications do (e.g. the unofficial phone explorer).

Directly via the exposed API - not really.