I would have to go with GeekyPenguin with the fact the the term "sorority" was coined for Gamma Phi Beta.  Two years ago when one of our members was installed as a Panhellenic officer and a lot of our members attended, I started laughing when our PH officer mouthed "sorority" every time the term "women's fraternity" was used in the installment speeches.  I still think about that when reading NPC material that states "women's fraternity"- Because Gamma Phi isn't!  
 
As for local, I think my favorite fact is that our chapter is one of the first three (who all colonized at the same time) at UCR and is one of the two which have survived since colonization in the 70s- Kappa is the other and both of our chapters are typically considered the strongest on campus.  Not to mention, our members usually have very close ties with Kappa members and always have.