Preorders:
17mm lens at BHphoto, Amazon, Adorama.
23mm lens at BHphoto, Amazon, Adorama.
50mm lens at BHphoto, Amazon, Adorama.
News and Reviews:
Press text at Explora. 17mm test at SonyAlphaBlog. 23mm test at SonyAlphaBlog. 50mm test at SonyAlphaBlog.
Youtube reviews: