A new release of the Mono PHP Compiler is now on SourceForge including souce code, binaries, samples and a tutorial.
The major new feature is that you may now use functionality from other .NET assemblies directly from a PHP script as described in the previous post. Like that you can e.g. build Guis using the Gnome libraries.
I also fixed a lot of bugs and implemented some other new features such as interfaces, abstract classes, exceptoins and magic constants. More details are available in the changelog which is enclosed in the binaires package.