Competitors are <A HREF="http://news.yahoo.com/s/nm/20060130/tc_nm/rim_competition_dc">muscling into the wireless email market</A> dominated by Research in Motion, as the maker of the BlackBerry email device grapples with a patent battle that could shut down its U.S. service. While few analysts and none of RIM's competitors believe there will be a BlackBerry blackout, the uncertainty has put the spotlight on alternatives to its email system. The timing is perfect, says Clyde Foster, chief operating officer of Intellisync, the wireless email management firm bought by Nokia to boost the mobile giant's position in a market dominated by RIM. The rest of the market is not only catching up with RIM, but also offering more cost-effective choices on a wider range of phones, Foster said.