Harriet Harman is playing the class war card, and I suspect that Brown didn't know or authorise that daft class-based idea of hers. It was designed to big her up on Labour's left, Polly Toynbee declaring it Labour's biggest idea for 11 years. You may laugh at Harman, but Labour's wonky leadership rules made her deputy leader because she hoovered up the third preference votes. This may take her to the top.
Next the Milibenns - Ed Miliband and Hilary Benn who are now positioning
Next group I call the Orphaned Blairites. Basically, my favourite people: John
Ed Balls has pretty much given up. His plan was to be see as the real genius behind Brown's economic miracle - now he's left looking more like the navigator on HMS Titanic. Yvette Cooper's stock has risen within Labour ranks meanwhile, so his best hope may well be as her deputy.
Other players include John Denham, a dark horse who may yet stand as a unity candidate. Peter Hain sees himself as Labour's conscience, is against Purnell's welfare reform, green, pro-union, anti-privatisation. And, hilariously, John Prescott. We may see him as a priapic oaf but he remains curiously influential in Labour circles and his mission is to stop what he sees as the Harman/Toynbee axis.
It's likely that Mandelson will play a kingmaking role here, not because his endorsement is influential but because he's a Class 1 powerbroker. I suspect he believes his role is to "save" the party his grandfather did so much to build, and this means keeping the inevitable civil war to a minimum level of violence. Good luck to him, because there is very little to unite the above tribes.
Labour in Opposition may prove to be as divided as it was after Callaghan - and then, it split. Brown's errors will deliver Cameron's first term. The fight between the Gangs of New Labour may well deliver his second.