Munich standardizes on Kolab for its groupware

The problem is "average" companies tend to be very different. I think non windows setups work best in medium sized companies with one to three tech staff. If they're too small they don't have the resources to get Linux in place. Too big and existing infrastructure (inevitably Microsft) is too far entrenched. The key to the process becomes getting the top decision maker on board with moving to that system. Most managers are too apathetic to care about things that are already "working fine", and don't want to move into unfamiliar territory.

The biggest block I've typically experienced are people demanding Windows/Office. Calc is no Excel, and I'll concede that, but many people insist on using MS Word but could just as well be using freaking Wordpad for all the functionality they used. That kind of thing. Where I work I've given up trying to migrate off of Windows due to various special purpose programs, but I've been doing well on the server side. I don't like the over complexity of Exchange, but have to admit it's been pretty good to me. Still, I'd really like to get us off of it, although our love affair with "Public Folders" will probably never allow that.