Google search API’s
Google recently (1 June) announced their Google AJAX Search API which is really rather neat! One definate advantage is the ability to geocode UK postcodes.
All you need to do is use the results from the GlocalSearch() object to get at the lat/lng. see the code behind this demo app.
An immediate application that I can think of is for Talis’ Silkworm directory. where currently you have to zoom into the area that your library is located. If the directory could just use the postcode info you had already provided, then all you would need to do is specify the exact spot!