We've been running this for several months now. Some of the datasets published are the result of in-depth research by our journalists and researchers - for example, http://www.guardian.co.uk/news/datablog/table/2009/jun/09/eu... required calling 50 individual councils to obtain the local break-down results of the European elections (which are only officially published as aggregate totals).
We actively encourage people to use the data for their own mashups and visualisations. Some of the stuff people have done can be seen in the Flickr group: http://www.flickr.com/groups/1115946@N24/
You can see a full list of available datasets here: http://www.guardian.co.uk/data-store
We actively encourage people to use the data for their own mashups and visualisations. Some of the stuff people have done can be seen in the Flickr group: http://www.flickr.com/groups/1115946@N24/