Good video tutorials here that offer some inspiration:
http://max.adobe.com/online/session/112
Though Digital signage has proved to be a significant and viable advertising medium, the question for media buyers remains “How to buy it?”
This article from Digital Signage Expo brings up good questions and resolutions. I agree that although the growth in this market has been phenominal, the real growth will commence when real advertising money starts flowing in.
http://bit.ly/49au6d
It's nice to see a retailer go this hard with its digital signage efforts and pull something off we will all use as a positive reference case on what's possible.

NEC digital menu boards help @PeiWei restaurants connect with guests, provide menu & promo details
Augmented ID is a TAT concept that visualizes the digital identities of people you meet in real life. With a mobile device and face recognition software from Polar Rose, Augmented ID enables you to discover selected information about people around you.
All users control their own augmented appearance, by selecting the content and social network links they want show to others. Modifying your augmented ID is easier than fixing your hair in real life and, of course, TAT Cascades will make sure you look great!
According to a blog post from Ross Dawson, augmented reality and ID tagging might be the killer apps for video glasses. He may be on to something here.