At the Digital Signage Expo in Las Vegas last week, the business models were far more interesting than most of the technologies on display. Everybody uses commodity information technologies, Internet Protocol networks and LCD or plasma flat panel displays. But the businesses they build around these common tools are in turn interesting, exciting, confusing or just a bit nutty. This week, I'll be reporting on the digital signage companies I visited, the conference sessions I attended and the smart people I talked to at the show. (Subscribe at the top of the next column to get the updates.) To a number of us, it seems a bit like the Internet in 1996: a few seasoned pioneers, a lot of sketchy upstarts, and a handful of big companies like Cisco staking out early acreage before the rush. Stay tuned.




