It doesn't seem this set is of much interest over here (as oppose to the 1200+ posts and 130,000 views over at AVS)-- but I have updated this FAQ to include some "official" info from a Dell Plasma rep who has joined the discussion on AVS. I'm still on the fence about mine, I might cancel it...
This document represents a summary of the factual information from the 1200+ posts in the "Dell W4200HD? Any hands on?" post on the AVS forum. I don't know if this thread should become a "sticky" but hopefully it will offer the core of the information offered in that thread in an easily...