I continue to be amazed at how useful this script is for editing MediaWiki sites. We are doing a lot of conversion of Word documents to MediaWiki and the ability to paste content from Word and then use wikEd's Convert Pasted Content to wiki code is a huge time saver.

The search and replace is also a wonderful feature (it takes a little getting used to because you have to deselect the text before you can to a replace all).

The Fix tools are also a great help, and make it easy to convert HTML to wiki markup.

And you can quickly disable it w/o reloading the page.

This script has amazing functionality. It even has syntax highlighting.