This week I've been working almost exclusively on the new preprocessor project.
Brion has been asking me to hurry up on the preprocessor project so that he can release MediaWiki 1.12. So I reneged on my promises to work on DumpHTML and concentrated solely on the parser. Many thanks to Splarka and MZMcBride for feeding me a steady stream of bug reports. We now have a scheduled switchover date: January 24.
I did some code review, mostly to allow me to keep the codebase on Wikimedia extremely up-to-date, so that Splarka and MZMcBride could test the most recent version of the parser. I wrote a couple of parser-related features: Special:ParserDiffTest and #iferror.