I need to get back to work on reviews and deployments and other such strategic things. I hope the work I've done on HipHop support is enough to get the project started.
Initial benchmarks are showing a 5x speedup for article parsing, which is better than we had hoped for. So there are big gains to be had here, both for small users and for large websites like Wikimedia and Wikia.
There's a list of things that still need doing under the "to do" heading at:
http://www.mediawiki.org/wiki/HipHop
I'll be available to support any developers who want to work on this.
-- Tim Starling