Just a technical point. EGDE is not a software enhancement to GPRS. EDGE uses a different air interface modulation scheme. (GSM and GPRS use the same but protect the data in different ways). I think the change is 4 way to 8 way guassian but I may be wrong on that. The key point is this is a hardware change, not just software. EDGE however has been talked about for a long time 5+ years and some suppliers have built in EDGE hardware capability to their existing Base Station products. Consequently the only work being done is software support - this doesn't necessarily apply to all suppliers rememeber, some may be doing some frantic hardware development as the holy grail of 3G hasn't quite materialised yet!