I like:
"We're all in this together"
I think it plays nicely with the no-red-America-no-blue-America speeches that were so moving.
I also think that it acknowledges that there have been hard times, but somewhat optimistically.
But best, I think it helps to make the argument that poor or rich, we're all in the same boat, and we need to help each other to succeed. We all do better when we help each other.
Also, it has an "O" in it, which is important?
Any other suggestions?
I'll take slogans from the comments, if there are any (many), and put them in a poll for later.
Updates:
Here are a few more scrounged from around the web:
From a Reuters story:
"Winning the Future"
"Greater Together"
Here's a quote from the same story:
Obama is aware of that difficulty. He still refers to his old slogan at campaign fundraisers, emphasizing the "change" he has achieved, while dropping lines that could be test runs for a pitch to convince voters to give him another term.
"When you think about change that we can believe in, as hard as these last three years have been, don't underestimate the changes we've made," Obama said at a fundraiser in California this week.
"Inspiration is wonderful, nice speeches are wonderful, pretty posters, that's great. But what's required at the end of the day to create the kind of country we want is stick-to-it-ness. It's determination. It's saying, 'We don't quit.'"
I kind of like "We Don't Quit" from that.
I'd love something like:
"We gave Republicans 8 years to get us into this mess; Give Obama 8 years to get us out"
-- but it's not exactly pithy (unless you have a speech impediment)