Ouch! I hope the surgery goes/went well (haven't been on here in a few days, sorry), and you are back up and running soon. My advice from much knee surgery experience, is to not dick around when it comes to your physical therapy and rehab. They'll probably start you on it the day after you get out of surgery, just to keep the joint bending. It will hurt and you'll wonder, "Already?!? You just cut me the fuck open, gutted my leg, then bolted a dead guy's ligament inside it! Now you want me to MOVE it?!?!?" But, do so. Keep the mobility in the joint, because you lose it quickly. More than anything, don't slack when it comes to the self-motivated physical therapy and rehab.
Best of luck! I've still got that Punch tubo, and I think I'll smoke it tonight as an offering to the gods praying it all goes well for you...