Since I train at home and have limited space I do not have the luxury of a power rack. For legs, I've been doing front squats, sissy squats, leg extensions, leg curls, lunges, SLDL's and calf work. I wanted more so I purchased a roman chair squat apparatus from ebay express. (If you look for it, type in sissy squat machine since that is how it is listed.) Gotta love those old 'forgotten' exercises.
I used it for the first time last week and did three sets of 8 with just body weight. I continued with the rest of the leg training and then threw in two sets of 12 at the end of the workout. Soreness was pretty minor the next day and was completely gone by the following day.
I kicked it up a major notch yesterday and did 8 sets of 8 with just bodyweight. The first five sets were not too bad...the last three were filled with plenty of burning in the quads! Continued with the rest of leg training and was glad to finish.
I had a difficult time staying asleep because turning over onto my stomach caused my quads to yell at me when they touched the mattress. I love it!!

I haven't had this depth of soreness in months and while one isn't supposed to train for DOMS, it is nice to know I finally did something to put a hurtin' on the legs. Yahoo!!