That's awesome. Given your LSAT score, I'm surprised you were on the wait list to begin with.
Given my undergrad GPA (from a so-so school), I'm not surprised. Some people with similar numbers got in earlier in the season, as you can see on LSN, but mostly they went to MUCH better undergrad schools than I did, or did something extraordinary.
I knew that if I did get in, it would be a very close thing. In off the waiting list seems about right.