Hello everyone. First, sorry for my "english" :-)
I'm writing this post to announce that i have released a plugin for Glossary, that works well in Wordpress MU.
With this plugin, you can just add definitions of tems inside the admin area, and when you write a post or page, that contains that term, the Glossary will automaticaly add a tooltip text, using that definition.
I have used some code of IMM-Glossary, that doesn't work with WP 2.7+ and MU, and Sociable to make some funny stuff.
Instructions on how to use are written on my blog. I have also one english version of the readme file, but the portuguese is more "expensive". MU users have to make some few changes on the source code of the plugin, and if you use an version bellow 2.8.2, you have to change somethings on /wp-admin/includes/mu.php file too. Take a look:
Installing infomoz-glossario on WPMU
I hope to have suggestions of the community about this plugin, that was my first public hack for Wordpress.