3g coverage, do you get it!
I do. But I live in a city.
However, I have noticed on long train journeys that reception on my iPhones (3GS and 4) has been about 95 percent reliable.
On my Orange PAYG all the time, on my Orange Contract when Orange let me! 
I live in the country with the sheep but a 15 minute drive to the M40 and i do!
Shame about that map aswell, would be good to zoom in for detail.
Try this...
tbf though, I live in a city too. Went riding in Afan forest and Brechfa this weekend, and on my 02 iPhone 4 I had no reception for pretty much the whole weekend. My friend on his Voda iPhone 4 had reception and at least 2g data access the whole time.
Try this...
Yep nothing till the M40 but it looks like i have a hot spot in a field about a mile away.
Must be for the sheep. 
Yup, I do.
We had 4g at our building for a few days recently http://www.bbc.co.uk/news/technology-13802293





Yep, am on it right now. I can get up to about 6Mbps on it.
Paul's BR/805 system thread
(where the photos live) Paul's Flickr page