Started when the AirTran opened
Really (re)building up the Ave as a major shopping district but with national retailers now (Gap Company Store, Home Depot, etc)
City Rib on Parsons brings in the growing professional class in the area (right down the block from the courthouses and a few blocks up from the Federal building)

PLUS
lots of new homeowners moving east
from what I hear tons of Dominicans are repopulating South Jamaica
Cambria Heights has been suffering lots of problems due to proposed rezoning that would split it half and give prime real estate to the Jewish sect that only moved out there because their leader was buried there. They've been a growing thorn in the sides of the mainly West Indian/African American homeowners that preceeded them these past few years.