Today i-mode exists in 15 countries with the aggregate number of subscribers (all carriers in the i-mode alliance) topping the 250 million mark. That doesn't quite translate into as many actual i-mode users but at the end of 2005, they were in excess of 50 million.
Often, setting a trend in one high-tech country like Japan means eventually setting the pace for technology elsewhere in the world. Apple can't be happy about this, so we may see a response from them. Microsoft may end up becoming the king of mobile DRM, which would make it much easier for them to have a say in the market.