Thanks Quero. Since posting this question, I've dug up something that might work. My impression from doing a lot of reading here, and elsewhere, is that diving in VN is just not worth it, and in January, water will be cold too. I've found a way to fly to Bangkok, then to Phuket, reasonably priced, for a liveaboard departure. Having made it SE Asia, I'd really want to dive the fabled islands around Thailand. I've put in a couple of emails for the MV Jazz, as this is the only boat I can find that fits my schedule, but haven't heard anything from them. They're the last piece of the puzzle, but I'm afraid of timing out of other possibilities (if they exist) waiting for them. Do you know of any other options for the dates between Jan 4 and Jan 8, 2012?