~3Mbps for EDR isn't it? And I agree completely, mobile data technology is moving in leaps and bounds, and the networks themselves are moving in seemingly random directions sometimes. Do you want the N900 to support EDGE? UMTS? HSPDA? WiMAX? or to support BT and linking to a cheap(er) device that supports the data technology most appropriate to the part of the world you live in, and the network you connect via.
Now, if WiMAX ever makes it to where I live (without being superseded) then I'm sure I'll want it, but until then I'm more than happy with BT and a phone