PJAX looks slick and template refactoring to include it wouldn't be difficult. I want to look at Endless Pagination first though - infinite question display being the goal.
Modify media tag to locate resources w a revision based buster to allow maximum expires time for media resources. Improve compress.py to append hard buster keys.
Include only questions with tags from the interesting tags list. There's no tag linking for relationships, so that's something that might be useful too.
When I try to start a development server from the current master (7d7be63) with python manage.py runserver I get the following error: "Error: No module named endless_pagination". I assume that this is because the line "endless_pagination" in settings.py. However I can't find such a directory or file in the repository (not in on the - now closed - endless-pagination-pjax branch).