What about use as an enterprise desktop server?
I'm a bit disappointed that none of the Linux vendors are seriously targeting the Enterprise Mail/File/Authentication server market.
Had to help yet *another* company migrate away from a windows mail/file server this weekend. Didn't like the fact that you *still* need to jump through hoops to get centralized authentication working properly on Ubuntu.
Come on! enough with the virtualization/Web market, the battle is won there!
Let's get some serious traction behind an Enterprise Linux server for supplying *Enterprise* desktop services.
The components are all there (Samba/LDAP/Kerberos), why can't we have an installation profile that does the configuration for you, and plays nicely on upgrades!