You very well may be right about June being the time for the remaining uncomitted superdelegates to endorse. But one would have thought Gore, Edwards, etc. would have wanted to drive the last nail into the 'Clinton campaign coffin' because to not do so could have meant they would rise like vampires in the dark of night.

As I stated previously; its possible they wanted Pennsylvania to play out as they were afraid to alienate Hillary's base while a big state like Pa was to come in the primary season. The other reason may be the Gores, Edwards etc are pragmatists and just like Hillary would like a shot at 2012 so didnt mind Obama being bloodied up by Hillary enough to lose to McCain. Thereby Hillary gets the blame for defeat and allows Gore, Edwards,etc to run in 2012. Let's not be surprised that politiciams would want their own ambitions to come before the country's welfare. I hope this is not the case as I believe Obama will beat McCain because Obama's movement will still be growing and the status  and perceived status of the economy will continue to worsen during the general election campaign. Obama's campaign line of 'Do we really want a Bush third term !!!' will be the mantra of his general election campaign.