The links seem iffy at best. Just because you've worked for Candidate X in the past, doesn't mean everything you ever do in politics is for Candidate X.
The staffing links aren't the strongest part - it's the money. The elder Ackerman dropped $1.5 million on this effort. No one drops $1.5 million on a political cause without having a motive. The fact that they refuse to disclose any of their other donors should also make everyone wonder.
Also, the links with Unity08 (who Bloomberg was involved with three years ago) are indisputable. Americans Elect even has their old office space in D.C.