I don't have the DVD yet, but I saw this in High Definition on HD-Net via DishNetwork about 6 months ago, and it was incredible. The music and performance are outstanding, and the video and audio quality were remarkable. I assume it doesn't look quite as good on DVD, but the sound should be as good or better (since it was broadcast in DD5.1, but a DTS soundtrack should sound even better).
I've been holding out buying the DVD because I figure if it the concert was shot in Hi Def video, it may be an early release on Blu-Ray or HD-DVD, and I have to minimize the number of discs I buy in multiple formats!