As I've written several times, I've been training in Aikido for some time now.
The 50th All Japan Yoshinkan Aikido Demonstration was held in Japan recently and one of my instructors, Sensei Joe Thambu, had the honour of winning the Tokubetsu Embu Sho (the prize for the best demonstration). You can check out his performance here (Quicktime video); it's awesome :o! The suwari waza (techniques done while kneeling) he does at the beginning is unbelievable - I don't move that well even when I'm standing!
There are more clips of other people, some of the highest ranked in Yoshinkan Aikido in the world, here.