Scaled reports that White Knight Two has undertaken a successful test flight with the SS2 mounting pylon attached:-

Flight: 24 Date: 4 Mar 2010
Flight Time: 3.7 hr
Pilot:Stucky CoPilot: Nichols
FTE: Kalogiannis

Objectives:
Nosegear mod evaluation
Pylon evaluation
ECS evaluation

Results:
Objectives met. Successful evaluation of launch pylon effect on aircraft performance, handling and controls. Fired pylon mechanism in flight for first time.

Ian Kluft reports that WK2 and SS2 are visible on the flight ramp at Mojave Air & Space Port.

According to Parabolic Arc, Stephen Attenborough of Virgin Galactic has said that the first SS2 captive carry test would take place no later than the end of March:

• Scaled Composites Ramping Up for First SpaceShipTwo Captive Flight