I had ACl reconstruction in Febuary due to a moto x crash that also broke both wrists and a compund femur fracture! Crash was a year earlier, had to wait on the knee until everything else was good to go.
i used the oppisite side patella tendon, and am already back on a board. I was able to have full range of motion withing 2 weeks of surgery, I was actually able to walk out of the hospital with a cane, no krutches. and i am at a little less than 6 months and am almost compleatly recovered. This is my second season wakeboarding, the first having my own boat to take out when i want. all i use now are cheap compression braces and upgrade on boots. I dont want one foot out and have to do it all over again!
I talked with a Dr Sanders in TX, i would advise any extreem sport athlete to consult him prior to surgery, i am sure glad i did. This doc frequents the MX forums i am a member of, but understands the demands of extreem sports, and how passionate its athletes are. I would have made the trip to have it done there if work schedule would have permitted
All in all, i did do a moth of Pre-hab to get ready, and feel that i ahve recovered much faster than normal.