As nobody replies, maybe I should be more specific on what I'm looking for.
The requirements are:
- the distance between transmitter and receiver is less then 2m(6.5ft)
- the transmitter should have a small power consumption (it's battery powered)
- the transmitter should be as small as possible (it has to fit in a tangible)
- there should be several (around 6) transmitter "talking" to one receiver
In my last post i wrote that I think that a teensy + XBee could be a good solution, but now I think it might be a little bit to much.
After reading these two Wireless 101's (http://postscapes.com/arduino-wifi, Wireless Buying Guide - SparkFun Electronics) I think it might be better to use RF instead of the XBee.
The Nordic nRF24L01 (SparkFun Transceiver Breakout - nRF24L01+ - WRL-00691 - SparkFun Electronics) looks very interesting, because it's small, low power, cheap and I can connect several transmitter to one receiver.
I also found the panStamp (http://www.panstamp.com/products/wirelessarduino), which would be very nice, because i wouldn't need an additional arduino/teensy in the tangible. But I can't find much information about it, if I can connect several transmitter to one receiver.
It would be really nice if somebody could point me in the "right direction".
Thanks