Web 2.0 Discussion

Nuospace
http://www.nuospace.com

Create your company workspace on the Web with Nuospace. Invite your colleagues to create content, share documents, hold discussions, publish reports and newsletters in a shared company workspace. Track document versions along with related comments and approvals on the same page. Search across the workspace and inside of various types of documents. Involve your colleagues to make them getting updates on important posts or changes. Mark pages as confidential to control users access. There is no need for any technical aid to create your own workspace - it is provided as a hosted service. Free version is available for up to 5 users and 200M space.