OK, here is the update. Diana finally started her swim around dusk on Sunday night. She made it about half way from Cuba to Key West, the quest ended just after midnight (around 12:30 a.m.) Tuesday morning 8/9/11. Evidently she couldn't fight the sea, and her asma, any longer...
Still, my admiration for attempting it, and condolences for not being successful this time. It was a valiant attempt.
She has mentioned several times that one of the reasons for the swim was to focus attention on Cuba/U.S relations.