Don't know how valid this rumor is but apparently AT&T is tuning down edge in favor of 3G (According to AT&T's engineers). This could cause some issues for first gen users and maybe explain recent outages of edge service (As they switch bands for Edge).
http://www.mobileburn.com/news.jsp?Id=5979
http://www.mobileburn.com/news.jsp?Id=5979
AT&T rumored to be downgrading EDGE service
News by Brian James Kirk on Tuesday January 06, 2009.
AT&T is rumored to be downgrading the quality of EDGE data, effectively forcing users to upgrade to newer 3G technology. EDGE data, which once relied on an 850MHz band, has been switched to a weaker 1900MHz band in some areas across the country. The rumored shift in quality has the potential of affecting owners of recent phone technology sold by AT&T, including the original iPhone, BlackBerry and RAZR models.
According to Open for Business, a technology publication, AT&T technicians have confirmed this information, and the company's technical support team suggested that customers experiencing difficulties with their EDGE phone models should upgrade to 3G-supported devices. AT&T has "categorically" denied the allegations.