Dpreview posted their image gallery: http://www.dpreview.com/news/1005/10051202sonynex5samplesgallery.asp
New NEX preview on Photoradar and Quesabesde.
Image samples are available on CNET and digitalreview.ca
NEX5 and A550 at ISO 1600 (dpreview forum)
Hands-on at Photoscala (german)