I don't know if you saw him on this last Sunday's MTP, but I swear he didn't stop talking in that shrill tone or take a breath for about 10 minutes straight. He's really coming unglued. It will be interesting to watch how much more he unravels as she gets national attention.
I chose to watch Tony Snow on Fox News Sunday instead of Murtha; the shows are on at the same time here.
Murtha is gone over the edge and it will, as you mentioned, probably get much worse over time.