I want to add a personal note onto what dria said about today's Mozilla activities. (TL;DR - Zarro Boogs on Firefox 4, new Web O'(pen) Wonder demo site, and a new Open Web Apps release.) We made bug fixes and enhancements to Mozilla Developer Network.
We made a handful of improvements to the localization code and process for MDN. Our web localization team is doing great work adding 15 new languages for the MDN interface!
We've also made performance improvements and bumped our YSlow! score up to 88. We're almost ready to hook it up to a static CDN which should get us a strong 'A' grade. (We can't make those DNS changes while IT is preparing Firefox 4 release infrastructure.)
And if you poke around you might see a hint of what's coming soon to MDN.