Wired has an article on recent developments in the US mobile phone game market. It includes some coverage of this year's mobile section of the GDC. I was surprised by the buzz mobile games got at this year's GDC, but the title of the article, "U.S. Set for Mobile Game Invasion", may hold an explanation.
The article also quotes Fred Condolo, a former co-worker at Kalisto Entertainment, who now works for In-Fusio, one of the bigger companies in this market, and, since Kalisto's collapse, the biggest game-related company in Bordeaux.
Meanwhile, in Europe, people are gambling using their mobile phones.