and all the built in stuff is just plain C++ too and can be found in the lib directory. I really like how easy it is to hack prototypes together with Arduino.

and all the built in stuff is just plain C++ too and can be found in the lib directory. I really like how easy it is to hack prototypes together with Arduino. I recently moved my own prototypes from PIC24 to a Teensy++ (a tiny little Arduino compatible board) and its made life so easy! Its a lot of fun to play with and the wealth of libraries makes prototyping a breeze. Just today I was tinkering with ultrasonic sensors and with bluetooth modules. For end products, I'd use C and LUFA for atmels rather than Arduino (or a PIC24 if I want 16bit or some of the other fancy PIC24 features, like 40MHz Fcy on PIC24H! since I have no experience with non-8bit Atmel micros)