billion wireless device users, some 600 million wireless
Internet subscribers, and a $200 billion mobile e-commerce
market [8]. The Gartner Group estimates that
by that same year, 40% of consumer-to-business
e-commerce will be conducted over Web-enabled
phones [6]. The average cost per minute of wireless
usage is expected to drop to two cents per minute in
2004 [7]. It is expected that by 2008, the number of
wireless Internet devices will outnumber wired
devices [7]