A DVD would be okay, I guess, but most of the material from the last two albums won't gain much from being played live, and their first DVD contains the entire STYE album and all the tolerable material from R2R, so essentially the only DVD worth making would be one of them playing old material (Clayman and back). I would love to see this, but clearly they aren't really interested in playing that sort of stuff anymore, otherwise they'd still sound like that. I really wish they'd kept going with the idea of rerecording Lunar Strain around Whoracle, though.
Anyhow, one thing that might be cool would be a Cliff-Em-All style thing where they find some good bootlegs and throw 'em together with maybe some interviews, history, fan shit, etc into a raping-the-fans-for-cash package that could pretty good if done half decently.