on codeplex:
We are in the process of releasing Beta 2 of Phalanger v2.0 - The PHP Language Compiler for the .NET Framework. We've made many improvements and fixed a number of bugs since Beta 1. The major feature of Beta 2 is the possibility to integrate Phalanger with Visual Studio 2005. The integration package will be available very soon!
Meanwhile, two new documents describing Phalanger and its internals are available

http://www.codeplex.com/Wiki/View.aspx?ProjectName=Phalanger