Not by choice, however!
The manga Mudazumo Naki Kaikaku, a seinen comedy by Hideki Owada, is reportedly getting made into an anime. It's a mah-jongg manga, but this is no Saki or even a Kaiji-- in it, former Prime Minister Junichiro Koizumi takes on other world leaders like our own Dubya, Kim Jong Il, Vladimir Putin, and more.
The news comes, as is so often the case, from an obi banner on the latest release of the manga (volume two). That, of course, means that there are no dates, directors, studios, or anything along those lines attached...but it sounds like one of those shows that could totally fail, or could be really amazingly awesome.
So what famous figures would you want to see playing mah-jongg? I'd kind of like to see Miley Cyrus playing in the background sometime. Maybe Spongebob. And Kamina.