Hello,

I would need your advice on choosing a wiki suitable for a company's intranet site - something like a lighter version of http://www.thoughtfarmer.com/.

The intranet pages are not many and need to be editable so this is why I thought it would be good to use a wiki.
I would need generic company section -  homepage with announcements and latest news and as well a user section (a who is who part) where a listing of users(employees) would be shown.
Each employee needs to be able to create personal page like a profile and also to be able notify automatically by email other users the profile gets updated.
Another functionality needed would be a forum - linked to each user's profile page (so when viewing the profile of a user one would see what topics that user has opened or the latest posts from that user).

I think the forum part is the trickiest one... could you please advise if there is any wiki platform out there supporting all of this?

Thank you