Not a bad interview for mass market TV with Dr. Groat below.
He confirms my impression that we aren't getting a clear prognosis on the "top kill" at this time.
Nobody's talking much about the period of time between a hypothetical failure here and a successful relief well on a time scale of a few months. Maybe there's not much that can be done.
We are possibly facing a particularly fierce hurricane season, too, based on the usual heuristics for such things.
Update: The NYTimes quotes an anonymous worker on the scene declaring failure. It's not clear that this is definitive. Some speculate that BP wants to defer the declaration of failure into the long weekend. (h/t RN: see comments)