I've been a user of both Verizon and Sprint's EvDO services off and on since their roll out. While a local San Diego company Novatel makes lots of the cards that work with EvDO the problem isn't the cards Russell has his concerns and I have mine.
From day one Qualcomm has built a great wide area high speed technology. That's the good news. The bad news is they have been anti-WiFi, and now are Anti-WiMax, which is exactly why Sprint married up with Intel on WiMax. Qualcomm needs to stop being religious about only their technology and begin to embrace other wireless technologies and make it so their so called carrier partners don't make it hard for other Wireless technologies can co-exist. So while I'm a fan of EvDO and of Qualcomm's engineering prowess and marketing smarts, I'm concerned about their approach to date.
If Sprint, Verizon and others said to their customers sign up for one stop wireless access, built a piece of client software that allowed seamless roaming and hopping, didn't limit the upload and gave everyone more speed, then more EvDO cards would be sold, and more EvDO would be used because being connected is like "crack" and once your connected you always want to be connected.