Uploading data without an Ethernet Shield


I am building a wireless e-health device using a shield designed by the folks over at Cooking-Hacks. I am using a Zigbee for the wireless transmission of the measured data. Initially I was using a ConnectPort X4 (gateway by Digi) to house the data for online access but due to the MAC Address restrictions in my University, I had to scrap that.

Now I was wondering whether it is possible to transmit the data using 2 Zigbee radios and 2 Arduino boards, and then uploading the received data to a hosting website like ThingSpeak without using an Ethernet shield.

Any hints or ideas would be greatly appreciated,