Advice on a class

Hi All,

I work in a digital library and am transitioning to something more like a programmer and less like a librarian.  My strengths are in xslt and unix, but I've been working some with php and ruby on rails.  I'm trying to learn as much as I can, and am considering enrolling in an intro to C programming class (free through my university's night school).  

Is this worthwhile, or should I focus my attention elsewhere?

Thanks,

Tim Lepczyk