Chris Jones has pointed out that the Google Summer of Code Projects for 2009 has been finalized and several PHP projects are on the list.
There's seven projects with a wide range of topics - here's the list:
- run-tests.php improvements
 - Add decision and path coverage to Xdebug's code coverage instrumentation
 - Bug Tracker Improvements
 - PhD Improvements (Plugin System)
 - Abstract Extension API and Dependency Interface
 - Benchmark creation
 - PhD O.E. - Online editor for the PHP Manual
 
You can find out more about the Google Summer of Code here.




