Clinton has fought a hard fight, and I think more than anything right now she is working out how she can leave without loosing. She wants her political career. I think her running so hard has been good for the party and the country, she and him have generated record primary turnouts, and voter registration is higher than it has been in years.
Now, it may be time for her to bow out, the superdelegates are switching to obama at a high rate, and when the time comes (as early as next week) when he has more pledged and super delegates than she does, I think she will go. She doesn't have the money in her campaign to keep on. And plus, obama has proven to be the best campaign fundraiser ever (bill was good at this, but obama has the internet donations going), and his highly grassroots campaign has generated a lot of mobilization.
I think things are good now for the democrats, and so long as clinton finds a reasonable time to bow out, all should go well.