Article: NEW BUZZ IN THE AD BIZ; Their effectiveness is still an open question, but digital signs are the new frontier in advertising. And four Twin Cities software companies are competing for a piece of the market.(BUSINESS)

Byline: STEVE ALEXANDER; STAFF WRITER

Digital signs are popping up on billboards, at gas pumps, at the Mall of America -- and a group of Twin Cities companies selling software that remotely controls the digital signs is hoping to cash in on the new advertising medium.

BroadSign International of Minnetonka, Wireless Ronin Technologies of Minnetonka, Telentice Global of Golden Valley and 3M Digital Signage, a unit of the Maplewood firm based in Bainbridge Island, Wash., provide software that ensures digital signs display the right information or advertising at the right place and time.

The market for such software is still relatively small -- no ...

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