1. Arduino Uno
2. Twitter Account
3. A twitter account access token from....(http://arduino-tweet.appspot.com/)
4. Sparkfun Wifly Shield (WRL-09954)...Check out the schematics and documentation on their website, then download library from Github. (https://www.sparkfun.com/products/9954)
5. Sparkfun Graphic LCD 84x48 - Nokia 5110..schematics and sample libraries available on Sparkfun website (https://www.sparkfun.com/products/10168)
6. DHT11 basic temperature and humidity sensor: take a look at the schematic and documentation (http://www.adafruit.com/products/386#Downloads). Download the library.
Sample code is attached.
The internet connection I used wasn't password protected so the ssid and password portion of the WiFly code would need to be updated. I'd suggest downloading the Wifly library then copy and pasting blocks of the sample code into the Wifly autoconnect example.