Can you please tell me where I can find the eagle library file for the atmega328p?
There are a few libraries around for the arduino for use in eagle. Have a look at what sparkfun and lady ada offer.
But to get you going use this: http://www.faludi.com/2008/10/07/arduino-avr-library-for-eagle-layout-editor/ The 168 has the same pin outs just change the label value to 328
The lady ada library has a lot of common parts used in the arduino environment. http://www.ladyada.net/library/pcb/eaglelibrary.html
Thank you Gordon