I'm in the same situation as the OP (close to $100k in UG debt, for me it was this school or a satellite branch of a state school, due to how badly i screwed up college admissions, lol). I've taken my LSATs, and I'll be applying for law school in the fall. I will probably be ended a T6 school, and I feel as though any additional debt I take on will be paid off, somehow, eventually. So if you think you can land that job, and you are interested in the law and aren't just looking to cash in, I would say go for it.
I'm also looking at applying for outside scholarships to try and help for law school.
Does anyone know if law schools take into account existing educational debt when calculating financial need?