I have tried to make bookmarklets for Internet Explorer and Netscape which allow you to quickly do a search on Wikipedia: you highlight any term on a web page, click on the bookmarklet, and a Wikipedia search on that term will be started. The Netscape version doesn't quite work yet. If any Javascript hackers could fix it, I would appreciate it.
You can find them here:
http://home.metrostate.edu/~Axel%20Boldt/bookmarklet.html
Axel