I posted a few of my other workouts, I thought I'd share a decent Youtube (it's a short 3 minute video) ab workout I stumbled across. The dude goes through a good routine that I incorporated into my ab workout.

http://www.youtube.com/watch?v=4QSwkCMTTjs

Having said that, I run the ab exercises in the above video along with a variety of the following:

1) 20 lb Medicine Ball - declined bench set of 50
2) 25 lb dumbbells - declined bench set of 50
3) Planks - set of 5 - 30 second reps
4) Leg Raises
5) Broom Stick behind the head, declined bench - side to side twists
6) Leg Lifts with medicine ball
7) Elbow to opposite knee twists to exhaustion
8) My favorite - the floor wipes with 135 lbs - set of 50 (from the 300 work out)
9) I finish with crunches to exhaustion - my crunches include leg lifts in between each rep

I don't run all of those during each session, but a mix to change things up.

Please feel free to point me to any links or suggestions for ab routines that work for you.

Thanks!