This video from BriForum 2008 is entitled VDI Product Smackdown, and was presented by Brian Madden. From the session description:
There are several VDI products on the market now, including Citrix XenDesktop, VMware VDI / VMD2, Qumranet Solid ICE, and Quest's Virtual Access Suite. In this session, Brian Madden will compare the various solutions and look at what's real and what's not. This will be one of our interactive workshop sessions where we'll look for feedback and discussion from the audience about what people are looking for and what peoples' experiences are with the current products.