One of the original reasons I chose the 6700 was because it had WIFI built in.  I figured I would save mega-minutes on my cellular bill by using WIFI when I could and limiting the EVDO time.  But with Sprints wonderful data plan EVDO is only $15 a month and has pretty good coverage.  EVDO is more reliable and faster anyway.  Maybe the Treo 700w had the right Idea, but the wrong price point on the data plan?