The "official" national launch is April 2009. Many markets are being installed as we speak and hundreds are already open with only in-store or localized advertising.

BTW - the link on the OP. Thats a regional site, not a national site. You can see that at the bottom of the page where it states:
McDonald's restaurants located in Kentucklana, Central Indiana, Northern Indiana and Southwest Michigan, Peoria/Bloomington, Champaign, Decatur, Springfield, and surrounding areas in Central Illinois