I haven't wasted my breath on Unity08 because I couldn't figure out who it would appeal to.
Sure we all want "unity" in the abstract, but U.S. politics are about real people (candidates), not abstractions. So the key question was: who would they run?
If there is a broadly unifying person in American politics, I haven't met him or her. Just because a candidate talks about unity doesn't make him or her a unifier. After all, George Bush insisted he was a "uniter, not a divider." Did anyone outside David Broder's alternative universe actually believe him?
So without an obvious "unity" candidate, Unity08 really looked like a stalking horse for Mike Bloomberg. Mike who? I'm a New Yorker so I know who he is, but who outside New York does?