EDGE vs EvDO
I should mention that EvDO technology is applicable only on the CDMA networks, and those are being used by Telus Mobility, Bell Mobility (and a few more not available in Ontario) in Canada, as well as several cell phone providers in the United States. Europe, on the other hand, as well as some Canadian providers such as Rogers and Fido, use GSM/GPRS networks. Their equivalent of the EvDO is called EDGE (Enhanced Data rates for GSM Evolution), or Enhanced GPRS (EGPRS).
EDGE has been introduced into GSM networks around the world since 2003, initially in North America. EDGE is currently in its 9th release, and offers slower speeds than EvDO. According to Roger's Web site, "the Rogers Wireless EDGE network enables data [download] speeds averaging between 100-150 Kbps" (Telus' EvDO's is 700-800 Kbps).
GPRS = up to 56 Kbps
EDGE = 100-150 Kbps (up to 3x times the speed of GPRS)