Links

For compnents, data sheets, and a new cheap shipping service (thanks!!)

Mouser   http://www.mouser.com/

Parts, Arduino libraries, boards, Eagle tutorials, everything a hobbyist could want

SparkFun   https://www.sparkfun.com/

Great I2C Sensor Library for Arduino

i2cdevlib  https://github.com/jrowberg/i2cdevlib

Another great, maker-friendly site for parts, boards, info, tutorials, ideas

Adafruit   http://www.adafruit.com/

A great place to get low run pbboards made. Submit your files online and order. For my order of 5 boards of the rev 1 watch, it cost $10 + $8 shipping and they sent me 6 boards. For rev 2 it cost the same and they sent me 12!!!  Thanks guys.

SeeedStudio Fusion  http://www.seeedstudio.com/service/index.php?r=pcb

And thanks for the great work on the 1284p bootloader

Maniac Bug   http://maniacbug.wordpress.com/2011/11/27/arduino-on-atmega1284p-4/