PHP $ Donations: Where to?

Hey Guys,

Anyone know where I can donate $ to PHP?  In any capacity (PHP Group, 
PECl, PEAR, QA)?  I've looked on the site and Googled the terms but have 
yet to find something solid.  If this is not the right list please let 
me know.

I just started a new job as Senior Software Engineer at a company called 
Gravity Switch In Northampton MA. We are largely PHP based and one of 
the things on my plate is to choose an open source organization to 
donate $50 to.  Of course my first choice is PHP so if anyone can point 
me in the right direction that would be great.  It's a small amount but 
the cause is there.

Thanks,
Justin