2012 First Flush Darjeeling is now available from http://www.darjeelingexpress.com/ They send it out the day you order it - check them out!
Thunderbolt Teas isn't quite ready to market their first flushes, but it should be any day now. On their blog is a great picture of a Darjeeling tea field.
I haven't found anyone else with this year's teas for sale. If you know of any, please let me know so I can tell everyone.