Examples of Cool Projects...
Project ShapeOkoTotally Awesome Sylvia Watercolor Bot
iFetch
Balanduino
Helicopter Blimpbot
Openbuilds v-slot
Funding for your projects...
Kickstarter, Quirky, etc...Create custom parts...
ThingiversePonoko
Dimension uPrint
Epilog Laser Cutter
Get motors, sensors, and other stuff...
SparkfunPololu
Adafruit
Jameco
Newark/Element14
Robotshop
and let's not forget McMaster-Carr
Arduino (and C) Code Samples and Communities
GitHubArduino Playground
Arduino Forum
StackExchange
Sparkfun
Adafruit
Learning Code (tutorials)
Jeremy Blum YouTube seriesYou Tube
AdaFruit / YouTube / A cool bit of engineering...
Sparkfun
ebooks