The RR still doesn't know quite what to do: back the serial-adulterer Giuliani with a liberal track-record on judicial appointments, Mormon "Magic Underwear" Romney -- someone they know only became "pro-life" 5 minutes ago (both he and Giuiliani fit into this category), or someone they know will not win? Dobson swears he'll choose the latter.
Giuliani isn't just involved in a scandal over using tax dollars to finance his extramarital affair; he's also got a brewing scandal involving his ties to terrorists. I really think his campaign is done, kaput...or else people are ignoring the mounds of dirt on this guy. See TCR's summary of Giuliani's worst week ever.
I don't think that there is anything comparable on Mitt's side, aside from a few gaffes and some reversals; no substantive corruption, but it may come out later. On the other hand, dirt on Huckabee is piling up, and he is looking dirtier all the time: 1, 2, 3, 4, 5, 6, 7...