I have been working on an implementation of RSync specifically for Google Drive. I now have it synchronizing between client and server using many of the basic rsync options. I am limited on the time I have with which to develop it and test it, so am looking to find volunteers willing to use the software and identify issues. The project is hosted on git hub here:
GSync on Github
Update: I have published the GSync application to pypi.python.org.
To install using pypi, you just need to execute the following command:
$ sudo pypi-install gsync
It will autoresolve dependencies and install require packages. To install the pypi-install utility on debian, execute the following command:
$ sudo apt-get install python-stdeb