Requirements

1. Dexcom receiver and sensor
2. Android device you can install an application on (now testing with many android devices)
3. Eclipse or another IDE with the free Android plugin ADT
4. USB OTG cable to connect the Dexcom receiver to the Android device
5. Hosting for node.js (you can also use a service like dnsexit to host at home over a cable modem etc)
6. Hosting for mongodb. I have had good results with Mongolabs. I have also hosted at my house with dnsexit.
7. Internet access for the tablet
8. A internet browser on any connected device to view the nightscout website.
9. Basic knowledge on how to compile code and basic node.js knowledge or a friend who can help
10. Of course you also need a computer to compile the code :-)