Some more to add that haven't mentioned, most of them more on the heavier side:
Between the Buried and Me
Protest the Hero
Today I Caught the Plague
Scale the Summit
Animals As Leaders
Just saw this a few minutes ago... http://www.youtube.com/watch?v=RgMelewSIOA&feature=g-u-u&context=G2efb49...
Hard to say. I know during the BCaSL tour they made a conscious decision not to make one, because they had done a live dvd the past 3 tours and didn't want to get into a repetitious cycle. It's quite possibly because of the addition of a new member that they might want to do one, although it might be a bit much since they also did "The Spirit Carries On Drum Auditions" series. If they don't do one for this tour, I would say that they would defiantly do one in a few years when they reach their 30th anniversary. Wow, DT is going to be 30 years old in 4 years... where does the time go?!
I know James used to play drums, I think it might have been his first instrument. Not sure if he still plays it anymore though. He does do a lot of auxiliary percussion (i.e tambourine, shakers etc.) during the show though.
While I completely agree with your sentiment, you do have to keep in mind that DT was nominated in a category called "Best Hardrock/ Metal Performance". With that title in mind, it is understandable how the Foo's won the award. If they category was for "Most Talented Musicians", then of course it would be DT (not to say that the Foo's aren't talented). The whole thing with the Grammy's is that it is a popularity contest, everything is based on sales. Talent can be pretty much irrelevant when it comes to these things.
In terms of them not being mentioned in the show, again the Grammy's are catered to a mainstream audience. They have just stared giving grammy's to metal bands. Given the musical tastes and attention spans of the the general society, they can't always announce every award for every category. There were a lot of good categories (best jazz record, best instrumental album) that were also not announced during the show, for the simple reason that the "mainstream audience" wouldn't know who the nominees were.
Like I said I agree with you completely, DT is one of the most talented and hard working bands out there and they deserve so much more recognition then whats been given to them. The fact they were nominated for a grammy is a great achievement that was long overdue. However, these mainstream award shows are not something catered to the progressive taste. Best thing to do is not to worry about it, maybe one day we will have an award show thingie just for prog bands. Until that time, best to pay the grammy's no mind and just let them do their thing.