A very nice person from our forums suggested I try the P90X workout program. I've been hitting it for a few weeks now and it's the best workout I've ever done.
If you're in reasonable shape, and you want to have your ass completely kicked, it is a fantastic way to do that. This thing has lots of workouts, lots of movement options, and even nutrition information. I love the holistic approach and the program is designed better than anything I've ever seen before. They pretty much take care of it all.
Just payin' it forward.