I say let Hillary have Florida and Michigan; they simply don't help her cause.
Using the counts from demconwatch, with Florida and Michigan and giving Obama the 55 "Anybody but Hillary" delegates from Michigan, she trails Obama by 59 delegates. Now add on to Obama's count the 4 "Pelosi Club" delegates and the 7 North Carolina congressmen and Obama's lead is up to 70.
When you consider that Clinton's Superdelegate lead has diminished from nearly 100 to 22 in the last month or so, and when you consider that the "Pelosi Club" is only likely to grow, I think it's a fair assumption that Obama will garner at least half of the remaining uncommitted Superdelegates.
That leaves Hillary needing to erase Obama's 70 delegate lead in the remaining primaries, even in the unlikely event of her capturing half the remaining Supers. That simply isn't happening. Obama, even capitulating on Michigan and Florida, will win the nomination by somewhere in the vicinity of 100 delegates.