A URL for the code repository (with an open-source license), so code can be reviewed. It is hard to review and update a giant patch.
OK, I took Nick's advice to heart and created a fork from the official cpython mirror on bitbucket. You can view the code patched in (branch: inca-only) under the following URL: https://bitbucket.org/sbrunthaler/cpython-inline-caching
Since it is a fork, it contains the usual LICENSE from Python.
Regarding Eric's hint: It seems that this agreement needs to be signed and mailed. Can I sign/scan and email it to somebody? (Or should I wait until there is a decision regarding a potential integration?) The way I understood Guido's last message it is best to use Apache 2 license without retaining my own copyright. I am perfectly fine with that but am not sure if using the fork with sub-directories including the official LICENSE takes care of that. Obviously, I don't have too much experience in this area, so if I am missing something blatantly obvious, I apologize beforehand...