Gamepot have brand new Sonic Adventure 2 movies. Unfortunately, they seem broken at the time (or Gamespot is being hammered) So Diablo of the Gameing-age Forum found a way fix them, and has uploaded them to his own server.
http://shadowhighway.tripod.com/radicalhighway.mpg
http://shadowhighway.tripod.com/sonicadv2-10.mpg
http://shadowhighway.tripod.com/sonicadv2-9.mpg
http://shadowhighway.tripod.com/sonicadv2-8.mpg
http://shadowhighway.tripod.com/sonicadv2-7.mpg
http://shadowhighway.tripod.com/sonicadv2-5.mpg
http://shadowhighway.tripod.com/sonicadv2-4.mpg
http://shadowhighway.tripod.com/sonicadv2-3.mpg
Thanks Diablo! Much appreciated. Checkout the Radical Highway level, top stuff!
Gamespot also have a preview. check out the page here