Did anyone see "The Office" this week? Dunder-Mifflin gets taken over by a corporation called "Sabre," but all the employees have a little trouble with pronunciation.

With that as inspiration, sung to the tune of "Party in the USA":
"Whoa-oa-oa-oa-oa-oa-oa, JetBlue's now using Sab-ray!"

Ok, that's out of my system now.

In practice, I've never actually successfully used another airline's interline agreement. Two recent-ish family experiences:

-Continental flight, much delayed, leaves SLC at 3am, but they won't interline on a Delta flight with seats available hours earlier between the same destinations

-American flight from BOS to LGA emergency lands in Hartford and stays there all day. American refuses to release bags to allow passengers to interline, even those whose final destination is not LGA. Most passengers finally bused to LGA that night. 1 hour flight becomes 10 hour voyage.

So, I think that interline agreements don't guarantee an easier time getting accommodation on alternative airlines. Good, flexible customer service is most important, and interlining simply a tool to accomplish that.