I know this post is a few years old, but I felt that I HAD to respond. Chi Delphia did become Chi Delta at Sac State. We are still established there and recruit every semester. Definitely worth a look into if you are still looking for a sorority. :-)
As far as Sonoma State, we expanded there in 2002, but the Beta chapter did not thrive, so they affiliated with ADPi in 2007.
Our new website is
www.ChiDeltaSacState.org