LEGO-lars:
2. upload the measurements to Cosm.com using a gprs-module. (I just smoked my gprs-shield so this can take some time :))
Thanks for this update! May be this combined board is usable: http://imall.iteadstudio.com/im120411004.html It is an Arduino, GSM, XBee, SD-Card on one board. It is cheap, but I do not know how power saving can be done.
Perhaps the new Arduino GSM shield is more power saving and battery compatible but there are some inconsistent information atm:
When <400 mA peak current is correct this would be an interesting board. But you have to pay nearly 100 Eur for the board only!