They (Ace Building & Remodeling) ended up having to rip out the concrete, replace the pipe, then backfill it and cover it with new concrete. It was all done in one day but unfortunately it took me almost a week to determine that I needed it done. A week without a drain sucks more than I thought. Dirty dishes everywhere, can't rinse them, can't throw them in the dishwasher, and can't cook since the pots and pans will be dirty all over the place.
Once again I'd like to thank the original idiots that worked on my house for not putting in any sort of access point to run a snake, not using the proper PVC fittings underneath my sink, and not elevating the dishwasher output line (all of which have been corrected now).
Nifty pictures here.