An O2 spokesman confirmed this to the INQ today and confessed that EDGE has been working in the UK for some time. So if you have an O2 handset, you should be able to see this for yourself.
What does this mean? Well, EDGE is a half-way house between regular GSM data - as provided by GPRS, and 3G. So instead of around 40-50 Kbit/s with a GPRS connexion, you should see about 160-200 Kbit/s.
Which should mean that surfing the net with the Iphone's Safari browser should not be too much of a pain.
As we mentioned previously, EDGE will work on a variety of smartphones, data Cards and USB modems. Not just the Iphone.
More to the point it should speed up email downloading on devices such as the RIM Blackberry along with O2's Xda range. µ
See also
Iphone to bring EDGE to Europe
O2 upgrades to EDGE in preparation for Iphone