When I used to be on Vodafone some time ago there used to be a function on the Vodafone Wap site that checked which transmitter you were currently getting a signal on then it worked out the nearest pubs etc.. or whatever you had asked it to search for.

This site isn't available to non-vodafone customers and as I am now on O2 I can no longer use it

I was wondering if there was a similar site out there?