I think this is an excellent proposal and think tags are a good idea!
My only issue is that we should try to find a way to template it, or do something so that it is easy to edit. Your box looks beautiful but it creates a bunch of markup. I presume that is what you meant when you listed the next steps.
Do you know if mediawiki has support for it in their template mechanism?
It also does support categories. Have you played with them?
I also found this extension: http://www.foolnology.com/blog/arindler/mediawiki-tag-cloud-and-google-suggest-extension.html
If you want me to install any mediawiki extensions, just send me URLs!
Keithcu 03:10, 7 July 2008 (EDT)