A survey by the Pew Internet & American Life Project discovered that 34 percent of Internet users in the U.S.
have used a wireless connection to surf the Web or check e-mail. The figures were up from February 2004, when 22 percent of Internet users said they had gone online using a wireless device.
http://www.siliconvalley.com/mld/siliconvalley/news/editorial/16785912.htm