sony 16-50mm f/2.8 lens sal1650
The SAL1650 is the 'kit' lens for the A77 and has been since last year!!
Plenty of reviews, and for the money it's excellent, very quick AF, and it can be very sharp at f/2.8
The only downsides are the distortions are a bit complex, and at large apertures, the periphery can be a bit soft, but in terms of what else you can get for the money, it's a no-brainer IMO
Perhaps you where confusing this for the new SEL1650 for the NEX? That's not f/2.8 though..