Features / Usability

Thank you so much chibaguy for your very clear answer, maybe you should write an introduction to tikki features to help people like me to understand the basics of tiki...

xavidp, I will soon give you the URL of the site but it's too early now...

Anyway, I've still two questions about the categories :
-Can i assign specific permissions to each category ?
-Can I attach an item (article, blog,forum...) to many categories (an article about mathematics in a specific grade would be in math category and in the specified grade category) ?
-How to create a category-home-page with links to blogs, forums, and latest articles ?

Thank you very much to all of you.
Wani