Yea don't point out to your wife that if she did CrossFit she could look like x or y trainer on the site. It's not persuasive, just retarded. Trust me.
There are several different sites out there that follow the crossfit framework and have they're own WODs: crossfitsandiego.com, spartafitness.com, etc. There's and infinite number of ways to design the individual workouts, really. You could even technically create your own to focus on a particular area like power, agility, etc., but the framework is more structured than it seems at first, you can't just do anything and have it be terribly effective. I'd stick to one of the pre-described sites. A great deal of firemen, police officers, professional fighters, and military personal now use a crossfit framework (as well as the actors from 300, seen here
That said, it's not the end game of all fitness and bodybuilding as we know it, but it has proven to be very effective and is certainly less boring than some other routines.
Oh and today's WOD:
Normal warm-up then