Personally I disagree with the 3 days off for any muscle group; unless you are hitting heavy volume in one day (IE Chest on Monday, Back on Tues etc). If you're doing full body workouts and spreading the volume out over a week, 1 day between workouts is all you really need.
When it comes to soreness, i generally won't work a muscle that is really sore. I may touch on it and work through the soreness with some dynamic movements.
What i really wanted to suggest is a homeopathic remedy for muscle soreness and aches. I've had great success through the use of Arnica Montana. It's available at most healthfood stores in pill form for general soreness and ointment for localized. I'll use the pills if i'm sore after a heavy leg workout, and i'll use the ointment if it's just my tricpes for example.
Give it a shot.