If you’re a certificate hunter, there’s a special events operation going on right now. It’s called the 13 Colonies, and there’s a special call sign in each of the original 13 colonies here in the states.
The callsigns range from K2A to K2M. Work one, and you can send for a very nice certificate. Work all 13 (not that hard – I’ve worked 9 of them tonight) and you get a special endorsement.
For more information, see their website at http://www.13colonies.info/