I updated the Roadmap for 1.0-beta3 today.
In short, we're dropping ambitions for audio support in this release. Once our migration to Vala is complete and the related changes implemented we'll release without further delay. After that we'll begin work on the newer features like audio, networking, and browser embedding for beta4 while the community tests and gives feedback on beta3.
There are a lot of new features already compared to the beta2 release. We're aiming for a beta3 release by January 1st 2010, 2 years from the beta2 release.