It seems I missed something fairly major in my round up of mobile visual search companies last week. Nokia have a serious project in the area called Point and Find. You can see a demo here. From MSearchGroove:
“Nokia is committed to owning the visual search space and has committed a staff of 30 to build the business and further develop the technology. The business area has the buy-in of Nokia senior execs and â€œquite largeâ€ funding from the company“
The technology comes from an acquisition of a valley startup called Pixto just over a year ago. Nokia’s service is apparently due for launch soon, initially recognising movie posters only.