Show me the data! Or how to digitize plots

I had mentioned the Guardian’s data blog and the need for more data journalism earlier here. What I really like about the Guardian’s approach in particular is that they share the data of their articles and encourage readers to use it. Of course there are perfectly valuable reasons for only displaying a chart and not making the underlying data available, e.g. to generate leads, as potential customers may get in touch with you asking for the underlying data, or technology issues that don’t allow you to upload data, etc.