I really enjoy lifing 7 days a week!

I split it up like this:

Mon: Chest (bench press also works triceps, shoulders and traps)
Tues: Back (most back exercises use the biceps)
Wed: Shoulders (shoulder press hits the triceps also get some trap work)
Thurs: Legs/Lower Back
Fri: Biceps (You've allready had some bicep work on Tues so you can go easy)
Sat: Triceps (You can also go easy on triceps, just enough to get a pump)
Sun: Traps or day off (I like big traps so I do them by themselves)

I add calves and abs every other day (Mon: Calves, Tues: Abs and so on)

I've found that this is the best way to keep from overtraining and the only way to hit each muscle's angles with many different exercises. Also, I'm done lifting in less than an hour every day. Most of my cardio comes from teaching Kung Fu but if I do some at the Gym, I'll do it right after my lifting for about 30 mins.

That's the way I do it but here is another:
day 1: chest
day 2: back
day 3: shoulders
day 4: biceps
day 5: triceps
day 6: quads
day 7: hams & calves

It's very easy to adapt and easier if you keep a log and don't worry about which day falls on what exercise- meaning if you miss a day just keep going and then your exercises will always be on different days, helps keep from getting bored.