This month's issue of Business 2.0 has a special pullout called "Your Wireless Future".
Carlo Longino of MobHappy does a great job of listing the companies to watch for specific applications (productivity, voice communication, location-based services, entertainment/social networking).
In the location-based services category he lists Semacode as a company to watch.
Semacode connects the mobile to the physical world using camera phones as bar-code readers.
Semacode is just one of the companies that provides this ability.
How does it work?
Semacode works by embedding a URL (web address) into a sort of two-dimensional barcode which looks like a dense crossword puzzle.
This is an open system. Anyone can create as many semacode tags for as many different URLs as they wish. Millions, even. As long as you own the domain name, the tagging system is completely unrestricted.
Congrats Carlo and nice job.