This is a work in progress so it wont look to brilliant right now!
Click the links below for a quick way to get to a posting you want without all the scrolling!
The boards -
Nano - Like the Uno just smaller
Uno - Normal everybody starting board
Mega 2560 - Like the Uno but with more pins!
LilyPad - Wearable board.
Starter projects - Basic projects to help you get to grips with it all.
Flashing LED - The "Hello World" of the Arduino
Serial - Computer to Arduino
Potentiometer, If commands and mapping with LEDs
LM35 Temperature sensor
Medium projects - Ones to get you thinking a bit more
4511 and a 7 segment - Using BCD to make numbers on a 7 segment LED display
Information - Little bits and bobs of info
The Diagrams - Fritzing - Software which can be used to make PCB, Schematics and breadboard views