Hi Vikram,
Incyte's Jakafi(TM) (ruxolitinib) was approved by the FDA only a week or so ago (11/18/2011). Incyte have the license for the drug in the US and Novartis has the license for Europe and most of the rest of the world.
For more information on this you can
go here. This site is dedicated to myelofibrosis so you should find most of your questions about myelofibrosis answered there.
Good luck
Alan Mead