Based on code from http://code.google.com/p/g-authenticator-wp7/ and other open source projects, this code provides a proof-of-concept on how to generate a qr-code that can be scanned on your mobile device after installing google authenticator on it.

http://www.google.com/support/accounts/bin/answer.py?answer=1066447
http://code.google.com/p/google-authenticator/

Please feel free to make changes, maybe this could be made into a library?