Barcodes and Cameraphones
Cameraphones are becoming more of a wearable device than a phone these days. A new product in this vein is SpotCode, a barcode system for pointing and clicking on various devices, such as vending machines or computers. This is done by using a cameraphone with bluetooth to relay "selections" based on barcodes on displays or signs.
Another application of cameraphones and barcodes came up during the ETech conference in San Diego. Chris Heathcote presented "35 ways to Find Your Location", which touched on using barcodes, cameraphones, and sticker printers to coat a city with locative barcodes to help people find where they are. Another use for this technology are "hidden" messages, and "barcode tagging".