If she is in the water, and a boat was involved, I found this comment, made by an Aruban on SM, on June 28th. I posted it on FR back then:
"So Jethro owned the Octopus-Aruba?? And he and the whole company (including boat) just up and vanished?--How long after Natalee's disappearance?"
I researched a little further, and found this site, also posting a few of these comments on FR. Read all the comments, and see what the last one has to say. It was true, on the 27th or 28th, that the octopus website was gone. I still can't pull it up. I could be wrong. Just wondering........
http://www.aruba.com/msgbrd/read.php?f=6&i=8363&t=8363
Somewhere on SM I read last week that Jethro is still in operation. Do a google search on it.