So, IMHO - indeed this is an example of a mobile web 2.0 service!Notes: a) The example may sound trivial since Big Ben is a well-known location ??? but the same principle could apply to images of other lesser-known sites.b) Of course, other types of data could be captured from the mobile phone for example video and sound. c) There are no major technical bottlenecks as far as I can see(there are so