I've just seen Friday night's Newsnight programme from the BBC. It's on the web at
http://news.bbc.co.uk/1/hi/programmes/newsnight/3123848.stmI think the video recording will be there till Monday evening.
The first item asks if Blair is now a liability to Labour. One Labour MP, Frank Field (sometimes a maverick, sometimes supported Blair) says "we are in deep trouble". Then the reporter goes round the streets of Stephen Pound's constituency with him - he's a fairly solid Blair supporter - asking a few people about Blair. The consensus is that he was OK, but it's now time for him to go.
The report then asks Pound (at about 07:45, if you want to see it - it's priceless):
"Was this a sobering experience for you?"
"Sobering? Bloody terrifying!"
I haven't heard of any serious talk about removing him (and I don't know what the procedure for it would be in the Labour Party now). From an anti-war point of view, the only serious contender could be Robin Cook - he resigned before the war, gave the chief speech in opposition to it in the Parliamentary debate, and as ex foreign secretary and Leader of the House, has credible experience at the top of the government. Against him is the fact that he rubs a lot of people up the wrong way - he frequently seems smug.
Gordon Brown, the Chancellor (ie chief finance minister) could be the only other contender. He went along with all the war decisions, but kept as low a profile as possible. He has always been interested in the financial side, and nothing else - he's introduced allowances and tax credits that his supporters say have redistributed wealth to the poorer people better than anything in the last 50 years - but the regulations are so complicated that I'm buggered if I can work out if it's true or not. Against that good left-wing credential, he seems obsessed with getting the private sector to build and run any government building project (eg hospitals, schools, roads, the London Underground). I really don't know what the party thinks of him.
In my opinion, Cook won't challenge Blair unless another major problem happens for him (eg the Hutton Inquiry putting all the government blame for the Kelly affair on Blair personally, AND saying he'd misled the public over the WMD; I doubt this will happen). Brown will never challenge Blair directly - he's been too involved with him, and it would look too power-grabbing, and like a rat leaving the sinking ship. If Cook did try to get rid of Blair, and it became obvious Blair was doomed, then Brown might come forward as the successor (like Major did after Thatcher, when Heseltine challenged her. There's a lot of parallels here).