I'd love it also, but unfortunately with some of the difficulties Delta seems to have with it's pilot's association (just look at the lack of nonstop to Hawaii because of crew rest issues), don't think it will happen. I could just see Delta telling it's pilots, "We'd like our passengers to be able to listen to your converstaions." Yeah, right.
Two thoughts though:
1. If Delta (or any other airline) added it, I wonder if they would put it on channel 9, which FT'ers and United passengers associate as the pilots conversation channel?
2. It's a little ironic that after the few weeks, were airlines were changing their ticket policies seemingly almost to resemble one another, channel 9 is a UNIQUE offering which actually makes United stand out from other airlines, and to some people makes it more desireable.
Jeff