Although all the attention has understandably been on the swimming, and traditional sports, there is no shortage of exciting martial arts action at the Olympics: Judo, Tae Kwon Do, several forms of wrestling, boxing, fencing...
I think you'll find the Judo competition especially interesting. MSNBC has highlights available on line. One of the fascinating things about this competition is the talent from all over the world. Japan dominates this sport, but plenty of other countries have sent impressive athletes. One highlight features a spectacular throw from a Kazakhstan judoka.
It's possible there will be some coverage this week of Tae Kwon Do, because of the human interest story about the Lopez family, which is sending two brothers and a sister to compete: three family members in one Olympic event.
I'm no expert on the Olympic sports martial arts, but I am one of those guys who gets all geeky about the Olympics when they come on. I find them compulsive watching.