Requirements

1. Dexcom receiver and sensor
2. Android device you can install the dexcom-uploader application on
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 :-)

Places we have hosted node.js are Azure, Heroku, Amazon and at home via dnsexit. The Node application runs well on most operating systems such as windows 7, windows 8 and redhat. I have had trouble running it on windows 2000 and opensuse so it is best to avoid those two.