I saw this post about the Wikipedia Explorer using WPF on Steve Claytons blog - it's really easy to use - I like the network mode - seeing all the relevant links - I also like how it adds columns to the page as you maximize the window...I see this as a model for how sceintific data/papers should be viewed.
"Using the latest WPF technologies, Dot Net Solutions has crafted an application to browse Wikipedia which we have dubbed Wikipedia Explorer. Compared to the standard text only view of articles, Wikipedia Explorer deals with and displays the relationships between the articles.
With the display of the data, the application allows 3 forms of view. An initial Document layout displays the article's content as it would be displayed in Wikipedia itself. The real value of the application however, is in the extra 3DExplorer and Network view modes.
Within the 3DExplorer mode, the main article is displayed in the centre of the screen with all linked articles shown around in a helix structure for quick navigation. Scrolling through the articles is as easy as scrolling with your mouse wheel."
What you get is a VERY powerful visualization of the flat by hypertexted Wikpedia. The 3D explorer is funky but the Network mode is just awesome. Put in a search term, switch to Network mode and watch the app build out the web of links before your very eyes. I think Tim has done a stunning job here but you can check for yourself as Wikipedia Explorer can be run as a ClickOnce application (note that you do need to install the .NET 3.0 redistributable package)