I did some more searching for you and this is what I found:
Elevators
Sit in a chair with one hand above your navel and one below so you can feel your abs moving in and out. Imagine that your belly is an elevator, and inhale deeply through your nose, expanding your middle fully; this is the "first floor." Now exhale through your mouth, pulling your navel toward your spine; this is the "fifth floor." Do five little squeezes, picturing your navel going out the back of your spine; this is the "sixth floor." Do 10 times.
Contractions
Sit in a chair, one hand above your navel and one below. Inhale and expand your belly, bring it back about halfway (third floor), then exhale and pull your navel in toward your spine (fifth floor). Squeeze your belly and hold for a moment, counting aloud 1. Release back to the third floor. Do 100 quick repetitions.
Standing Pelvic Tilts
Stand with legs hip-width apart and knees slightly bent. Rest your hands on your upper thighs. Inhale, then as you exhale, draw your abs in toward your spine and simultaneously tilt your pelvis forward by contracting your butt and pointing your tailbone down. Hold for a count of 5. Do 10 times.
http://www.prevention.com/article/0,...3888-1,00.html
Also...here's a list of TONS of ab exercises from that Prevention Magazine
http://www.prevention.com/topic/0,57...-ABC-0,00.html
But, make sure you do your cardio!
