It looked like Anthony is giving the same talk on Reef Toxocolgy and fragging workshop. Dr. Ron's other talk on the status of the reefs is, I think, the same. Kelly's and Sanjay's presentation titles aren't listed yet (but I assumed they might be the same...always dangerous).
That isn't a criticism...all of these presentations were great. MACNA has a number of additional speakers and topics, though. If someone were to have to select just one to attend, it seems that MACNA might prove the better investment (plus less opportunity to spend even more at the tables

)
Although, on closer examination it does appear that the MACNA tentative schedule only allows one 1 hour for each presentation (less setup time). The IMAC schedule, alternating between two rooms, allowed for a little more time.
(Steven, I owe you an email as well...I hope to find some time over the weekend to get that constructed.)