Since I wrote about my change of heart and subsequent purchase of an iPod touch, I have signed up to the Wi-Fi hotspot service provided in the U.K. by The Cloud. At £3.99 a month, with no contract to tie me in, I thought I would road test the service. Cambridge currently has 38 Cloud hotspots listed for the city centre, so the prospect of being able to connect looked favorable. Using the service is supposed to be as simple as possible. By registering…