I've seen it used in a big financial firm that processes card-holder data, but they were phasing it out in favor of Redhat. Still, Ubuntu is a solid choice for servers I believe, it seems to have fallen out of favor in some places though.
Second your desktop comment, Unity is unusable for me.
Yeah, it wasn't even Unity. I prefer i3 anyways. It's more that I like the bleeding edge (I need it for a lot of stuff), and I hate having to re-install every six months.
Second your desktop comment, Unity is unusable for me.