When WiiWare launched in Japan on March 25th, the service offered nine new games. Then, no new releases at all (except, of course, for My Life as a King and Lonpos DLC) until almost a month later, when Minna de Puzzloop showed up.
According to a Wired discussion with Reggie Fils-Aime, Nintendo of America is going to take more of a Virtual Console-like approach, in which
everyone complains that each week's new game isn't Earthbound two or three games come out every week. That means that all the games that were previously announced for launch, like Strong Bad's Cool Game for Attractive People, Pop, and Major League Eating will be spread out across the first month or so.