I'm still playing with our database of Wikipedia edits (which tells us how many contributions to the encyclopedia originate in each country) and made two more maps of Europe. The height of each country represents the number of edits originating in that place. The shading indicated the number of edits per Internet user (darker reds meaning higher per capita participation).
Interestingly though, Germany and UK have fairly low participation rates when normalised by Internet population. Internet users in Italy, Scandinavia, the Baltic States, and even Ukraine are more likely to make an edit to Wikipedia than their British or German counterparts.
Also notable are the relatively low (total and relative) participation rates from Portugal and Poland.
If you're interested in Wikipedia edit data, take a look at the other regional maps that I've made:
Middle East and North Africa