I enjoy coding in PHP, and it's also my primary language. I don't get much chance to use it at work though (in a school) as we have crapp Active Directory with IIS which I use ASP with (Wake-on-LAN script, dynamic Intranet, user password management).
I'd be happy to help contribute to the CMS in my spare time if you plan for it to be a collaborative effort.
EDIT: Forgot, I made a very small & simple script called MyBusinessCard
earlier this year
And a calendar that I have no use for any more.