No, it's more a documents feature than a wiki.

If you're thinking it's like the Zimbra
wiki that everyone can see and edit then, no, it's not like that.
It allows individual users to create documents etc. on their workspace and then share them with other users. Say I'm working on a business proposal for a customer, I'll want to create a detailed document containing my text, spreadsheets, graphics etc, this feature allows me to do that - it also allows me to share that document with coleagues for review of modification. There's isn't much info on the documents feature as it's still a beta feature.