My school had a short seminar with Sergei Ozhereliev once, and he is good. He also looks like a nice guy.
Systema work with weapons looks nice, but sometimes it doesn`t look like it could work in real life. Especially since it requieres relaxation. Don`t get me wrong, I think the main instructors can do it, but they`ve been in the special forces, so undoubtly they`ve had their share of fights. So they probably can be relaxed during a fight. But can a "normal" human be?

Karate - Shotokan I presume ... Kanku-Dai Bunkai (sorry if its a repost)

http://video.google.com/videoplay?docid=-3049095773474993915&q=kumite&pl=true

Richard Clear Silat Demo - http://video.google.com/videoplay?docid=3868648289863313105&q=silat&pl=true

Looks like a mixture of Tai Chi and Wing Chun to me.

Another - http://video.google.com/videoplay?docid=3291068969711114773&q=silat&pl=true

Jeet Kune do - http://www.reddragonmaa.com/Adult%20Intro%20Video%201205.wmv

Cant forget the kids! : ) http://www.reddragonmaa.com/Kids%20Intro%20Dec%2005.wmv

Here are some videos from my old school:
Hap Ki Do videos

I want to move like this guy.:)
Wudang Tai Yi Qigong

http://video.google.com/videoplay?docid=-1809842674918661188&q=ba+gua

Here is another style called San Soo. It kind of reminds me of Hap Ki Do, but it is a Chinese style.
San Soo Videos

Mantis Kung Fu -

http://www.mantismartialart.com/demofight-2.WMV

Gracie/Brazilian Jiu Jitsu

http://video.google.com/videoplay?docid=8022442135888085469&q=gracie+jiu+jitsu

Daito-Ryu Aiki-jujutsu: (scroll down page)

http://www.aikidojournal.com/media.php?media=video&page=12