RFID is a controversial technology, but it can have interesting uses like in
Musex. Via Mobile Learning

This reminded me of my post from last march (05.03.03):

Positioning in digital assistants

Recently we were asked to do a little research about mobile digital assistants and positioning in buildings. First we looked at GPS (Global Positioning System), as Japan and Korea do a lot of interesting stuff with gpsOne mobile phones. The problem with GPS is that it isn't very precise - the range is something between 5 and 50 meters.

Next idea was bluetooth and still is.

In the meantime I asked Tumasch Reichenbacher who did a presentation about SVG in mobile situations at the last SVG Open Conference.

He told me to check out the latest Ericsson Review and gave me the link to the one, he mentioned in his presentation last year.

He added:
"Natürlich gibt es für den Indoor-Bereich Positionierungslösungen mit IR-Sendern. Soviel ich weiss, gibt es da auch schon Pilotprojekte in Museen bzw. auf Messen. Vielleicht wäre da auch das Projekt Saimotion interessant."

Further reading:
Geospatial Information Service System for Browser-phones utilizing PSVG

How quickly things change.

See also:
Other PDA Projects from Koji Yatani, especially Toss-It.