Karen,Well my flight is booked. Here are the details.
Newark (EWR) to Atlanta (ATL) 7/24/08 8:55 am - 11:20 am Delta
Atlanta (ATL) to Cozumel (CZM) 7/24/08 12:28 pm - 2:00 pm Delta Operated By: /PINNACLE DBA DELTA AIR LINES
Cancun (CUN) to Atlanta (ATL) 8/02/08 1:38 pm - 5:34 pm Delta
Atlanta (ATL) to Newark (EWR) 8/02/08 7:05 pm - 9:23 pm Delta
Since I am arriving early I will need two extra nights (24,25th) in Cozumel. It would be really awesome if there is someone else who needs a roomate for those two nights so we can share the cost. I'll send my completed survey when complete I look foward to meeting/diving with all of you in a little over a month!! Karen
You should be good in both directions. You won't clear customs on the way down until you arrive in Cozy. On the way back, you should have ample time to clear customs in Atlanta.
Welcome aboard!