First off, Craig, welcome to FT (flyerTalk).

Secondly, we reffer to JetBlue as B6 for shorthand reasons. B6 is actually JetBlue's IATA code. Each airline is assigned one (always a 2 letter/number combination as a unique identifier for it's owner) before the can start flying scheduled or chartered flights. You'll often see CO for Continental, UA for United, AA for American, US for USAirways, and DL for Delta as the more obvious ones. The less obvious one include B6 for JetBlue, TZ for ATA, FL for Airtran, WN for Southwest, and F9 for frontier. We're starting to see HP disappear due to the fact that AmericaWest was taken over by US.

If you want to know more about the IATA, you can check out http://en.wikipedia.org/wiki/Interna...rt_Association.

For JetBlue's history, http://en.wikipedia.org/wiki/JetBlue_Airways