While the interline agreement has been in place since 2010, both airlines have just announced a full codeshare agreement...
http://www.marketwatch.com/story/jet...tes-2012-04-18
For someone who does 4-5 trips a year to the US - I really like JetBlue (the limited flights I took) and this just might sway my decision. Problem is, EK is not competitive to the US ex SIN...