BLEDWing, besides being an excellent name for a goth rock band, is also an excellent way to explore simple input and output for your Papilio FPGA development board. Simply snap the B/LED Wing into your Papilio board and you've got four LEDs and four push-buttons at your disposal! Project description, more information and ordering can be found at https://www.sparkfun.com/products/11509 Reference Page: http://papilio.gadgetfactory.net/index.php?n=Papilio.BLEDWing B/LED Core: http://gadgetforge.gadgetfactory.net/gf/project/core_led_button/