On Wikipedia, I write and edit a multiude of articles, ranging from Australia to metre. I don't particularly like starting new articles, though, because I'm really bad at structuring stuff the right way.
I usually go through articles and put appropriate outside links at the bottom of the article.
I also designed two new logos for Wikipedia early in January, 2002. They are shown below:
http://meta.wikipedia.com/upload/search.png
I also created the images of the Australian flag, and the map of Australian states and territories, boh shown below:
Finally, I just placed an aerial map in Perth I took from NASA (with my own added labels).
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