If Gordon Brown has any sense he will ignore the nay sayers and stay on until he's obliged to go. First of all he's managed to engineer what could be the end of the recession and he should be in charge until the outcome of his polices are realised.
Second of all, you cannot change the countries leadership without a general election...again.
Thirdly the backstabbers and quitters (Blears etc) don't impress anyone, and no one should listen to their words of advice, hopefully their disloyalty has condemned them to years in the wilderness.
The local elections look bad - but these were the shires for the most part - the Middle England, Daily Mail/Express/Telegraph reading heartland.
The alternative to sticking around is letting the Tories in.... and that can't be countenanced...