Karl, those videos are great, but there is nothing like seeing it in person.
At this time the club I belong to (RITC) is putting togeather a National Trial in Exeter, RI for June 23rd & 24th 2012. Riders from all over the country will be competing aswell as local riders. All spectators are welcome. There will be 12 sections each day with 3 loops = 36 sections. Some of the Guys & Gals riding will have you standing there, saying, how did they do that.
This would be a good time to get the New England NT riders out for a meet.
Other Nationals:
May 19th & 20th Cahuilla, CA
May 26th & 27th Tucker Ranch, CO
June 16th & 17th Toronto, OH