For those who are interested in filibusters -- and who isn't these days! -- Greg Koger was definitely worth listening to on NPR today. You can hear to it here. And as long as I'm linking, here's the index to Greg's guest blogging at the Monkey Cage, and here's his interview with Ezra Klein. Good stuff.
Might as well add...here's my post on why "live" filibusters don't happen (Greg's version on NPR has better stories).