I'm in a similar situation. I've worked as a Paralegal for 10+ years. I applied in 2007 with a 147/2.9 and got waitlisted/rejected. I met with the admissions person at one of the schools, and she told me that I could re-apply with a better LSAT, new letters, and a new statement. I finally got around to putting some serious work into the LSAT. I took a Princeton class and the the LSAT in Feb. I *hope* I got in the 150s. Otherwise I know I could hit 160 with a bit more time, so I'll keep working, retest in June, and reapply next cycle.
Have you checked the median score for the school to which you want to apply? You should wait an apply until you can get close or above that score, especially since your GPA is under 3.0.
Good Luck.