Are you looking for a place for your company / group where you can collaborate and share information?  Do need a space where you can easily and securely share files, calendars, discussion forums, easily build pages, and manage project tasks?  In short, do  you need an intranet, but don't want to have to maintain it?

Then we have what you are looking for.

Vinna is CompositeWeb's hosted intranet service that has a ton of features to help you.  They include:

• Group Calendars
• Group Content Management pages (similar to a Wiki, but easier to use)
• Group File Management System
• Group Discussion Boards
• A Customer Relationship Manager (CRM) with project manager
• Employee Directory
• Group Contact Manager
• Help Desk Ticketing
• more

As you can see, everything about Vinna is built around the idea of groups.  You can have as many groups as you need and add people to as many groups as you want.  It gives you the freedom to apply the security you need, or open everything up to all your users.  You decide.