Man, this thread brings back memories. lol!
Well, what leg exercizes does you doc have you doing? Have you been walking/jogging at all?
My personal suggestion is try light walking on a treadmill for the legs if you aren't cleared for much more. Also sitting in a chair, with no resistance, doing leg raises and kicks. You can even do these with >/=5 lbs. It may not seem like much, but as the saying goes, use it or lose it.
I LOL'd while I re-read this thread. Especially the part about me only squatting 250. I was up to 450-500 shortly after that post, even on my knees. I am going to be sooo frustrated after I get my surgery and am unable to do that anymore.