To all Atlas guys who have kept this thread going, Thanks!

Up to pg 140 or so, and skipping back to the new ones now and then.

Question, haven't seen an answer yet, if I haven't gotten to it, sorry for asking again.

Is there a list of acceptable gateways posted? What would the criteria be if there isn't a standard listing? Wondering whether Portland, Maine would make it?
All carriers except American. Southwest coming soon due to Airtran.

Thanks again