Fish,
If you haven't figure it out yet, Virgin America is basically a JetBlue copycat. Sir Richard still regrets the day he didn't invest in B6: Here's a quote for you...Mar 8, 2004 – ... Richard Branson was offered the chance to invest in a new discount ... in the U.S. "JetBlue (JBLU ) was the one that got away," he laments.

Virgin is going to have alliances/Interline or code share with International Airlines. B6 currently has 13 Total Interline partners (12 International and Growing). Virgin will do the same thing over time as their network grows. B6 and VX will eventually become the Domestic feed for international carriers.

JetBlue | Partner airlines