During Monday's board meeting, we voted to adopt the policy available at www.python.org/psf/trademarks. This document is version 1.2.2 because it went through a few rounds of rewriting on the board and PSF-members mailing lists, as well as some checking by the PSF's counsel.
We hope the policy is reasonably clear and understandable. If in doubt about any usage of the trademark, please write the PSF at (psf at python dot org).