Apology Accepted
I work for "Delta Connection" too. In fact, I work at the airline in question, so maybe your list is old...
"Delta Connection" means a number of airlines as obviously you are aware. I know that other "Delta Connection" carriers (in fact, I heard on our ALPA board that ALL of them but us) are allowing more than one jumpseater, but that is not the case at Comair. The security directive I am referencing is dated 12/04/01 and unless it has been updated since the last time I worked, which was the 22nd, it is still in effect. I am speaking only of other airline pilots by the way, not Delta, ASA, or Comair. We can non-rev anyway, unlimited #'s. I can also PM you a longer dissertation on the subject if you are interested. Here is the section I'm referring to:
OTHER AIRLINE PILOTS
Comair will allow pilots from other airlines (OAL) in uniform with reciprocal agreements to occupy a seat in the cabin using existing jumpseat procedures, if at departure time the jumpseat remains open, all revenue and non-revenue passangers are accommodated, and a cabin seat remains open.
An OAL carrier is defined as any carrier on the Comair reciprocal list other than Delta or ASA.
Anytime the jumpseat is occupied even if a seat remains open in the cabin, the OAL pilot WILL NOT be eligible to fly as a jumpseat rider, nor can he/she elect to travel as a pass rider at departure time...
As for Southwest, last time I jumped on them a couple of weeks ago I was told they were limited to the number of jumpseats in the aircraft...