If you want a simpler way to understand the power of tagging, I suggest John Udell's screencast. It's a really good description of how this stuff works.
GROOP.US is a web service to visualize your social context based on the tags you have used. It shows your areas of interests and relates people with similar interests to groups with shared tags and resources.
Freetag is designed for applications running on the LAMP (Linux, Apache, MySQL, PHP) stack. Theoretically, as long as you’re using MySQL and PHP, it should work. If it does, let me know!
simpy
