Touch is a project and associated weblog that covers near field communications. Most of the posts are primary sources to Touch's own work rather than pointers to other sites. Here's a snip from their About page:

Touch is a research project looking at the intersections between the digital and the physical. Its aim is to explore and develop new uses for RFID, NFC and mobile technology in areas such as retail, public services, social and personal communication.

It's one of those weblogs that, when you discover it, you spend an hour reading the archives. See, for example, this design brief on touch as an interactive medium, or this overview (along with presentation slides).

[via New Media Initiatives Blog]