The ARRL CQP is a nice challenge! Throughout the year the special event station W1AW is activating each of the 50 US states, plus territories KG4, DC, KH2 and KP4. By working each of the 50 states with a station signing W1AW/1, W1AW/2 ... you can work towards the special award "W1AW WAS". For that, a special award and a plagues wiill be available. All QSOs and award applications need to be done with the ARRL Logbook-Of-The-World LOTW database.
As per beginning of August, I have already confirmations from 47 states with 230+ QSO band/mode slots with W1AW/x on LOTW. Contacts with stations from Delaware, Maine and West Virginia are missing for the time being. It will take until November to get the last QSOs done: DE will be active starting November 26th, ME will start on August 27th and WV on October 22nd.
You can find more information about the Centennial QSO Party here: ARRL website. Good luck hunting for W1AW.