etiennebr,

And I would like to know if DekiWiki can add more than two page levels.

The page structure can go as deep as you'd like. 

I'd also like to know if there is a simple tool to move content from a wiki to another. First Adding the basic content on an local DekiWiki installation, and once it's ready, move the content on the Intranet, still with DekiWiki.

You can do this by backing up and restoring the content.  MindTouch Deki ships with a backup/restore script that can be run that makes it easy to move content from a private wiki to a public wiki.

If you have any other questions please feel free to contact us: http://wiki.mindtouch.com/support

etiennebr,

  Wik.is doesn't support routine backups.  It currently only supports one backup if you want to close your account or migrate to a Local install or Managed hosting install.  With the managed hosting install or a local install you can run exports as frequent as you'd like.  If you'd like to learn more about Managed Hosting or storing locally feel free to contact us: http://wiki.mindtouch.com/support