I also work for a company trying very hard to phase out Microsoft Products.
We are about 80% there. Our legacy is a win32 accounting program that doesn't like being used under wine at all. We have contacted the vendor and are requesting something nix based.
We will be there within 6-12 months
I can't wait. These Redhat boxes just work, all day every day. At very worst we ask a user to reboot and they are back to a functional machine.
Very handy using the desktop sharing to administer (we have a pretty widespread WAN)