Robin Cook was the politician whose views probably most closely echoed my own (although he wouldn't have agreed with me about English devolution!) His death is a huge tragedy and in my view leaves a real hole at the heart of the Labour movement.
The best piece I have so far seen on this came from David Clark (a former policy adviser) in the Guardian, which can be read at the peerless Guardian Unlimited site.
My own view is that Robin would have returned to government under Gordon Brown once the great charlatan had taken his leave of No 10, probably as some kind of constitutional affairs overlord. Unlike Mr Blair, Mr Brown regards this agenda as vitally important and is understood to be considering a number of options for radical reform.
You can read my full take on Robin's career here.