I hope (and I can only hope) somebody will come up with features that make MW a natural choice in business wikis as well. As Dave pointed out, an inbuilt WYSWYG editor is everyone's dream. Other than that, I think a wiki administrator would like to have built in features in MW as:
Different authentication mechanisms like LDAP, NTLM UI for creating users, groups and assigning users to groups UI for creating categories and assigning categories to articles UI-based access control mechanism based on article categories/user groups and usernames Review mechanism if needed Rating of articles
If you mean, you'd like to see support those auth methods, support is already available for them. The LDAP one will sync groups from LDAP, and it is possible to have the wiki create LDAP accounts (if you *really* want that). There are also quite a few access control extensions around, that work on categories, and even per page; the regular saying goes that the access control plugins can't be trusted regarding read rights...
If you only wanted the UI, then PHPldapAdmin, or some other LDAP admin gui would solve at least part of your problem.
V/r,
Ryan Lane