This is the last call for 2.4 *code* changes. Any changes which don't fix the Transfer Function bug should be held off on, or put into a pull request so that they can be evaluated as bug fixes.
1. Docs for VR & the hub 2. Transfer function bug ( https://bitbucket.org/yt_analysis/yt/issue/390/transfer-function-bounds ). Sam has a script at http://paste.yt-project.org/show/2609/ 3. Merge to stable 4. Release announcement / tarball / etc
1 is independent, 3 is blocked on 2, and between 3 and 4 we can wait a bit after unfreezing the development branch.