Diana Peterfreund has a great series going right now. Secret Society Girl (book 1), Under the Rose (book 2), and Rights of Spring(break) (book 3), with the 4th and final book due this May. They are all really great and will totally take you back to your undergraduate college days.
I also really Laura (lauren?) Willig. She does historical chick lit.
I haven't actually had time to read anything other than stuff for my classes since this summer (ahh the life of a grad student), but what I mentioned above is what I read.