Dart was actually created by the guys who created V8. They gave a great interview about it in episodes 8[1] and 8.1[2] of Javascript Jabber.

1: http://javascriptjabber.com/008-jsj-v8-and-dart-with-lars-ba...

2: http://javascriptjabber.com/008-1-v8-and-v8-and-dart-with-la...