The company that I work for has a strong resistance to Open Source products. It's not for the normal reasons that people resist Software Libré but I don't know what the reasons are.
Well, we are now in the conversion path from a POS called Continuus to using Bugzilla.
Colour me pleased.
On a separate but related note we are going from CVS to Perforce. I think this is also a good change. CVS isn't really good for a medium to large corporate environment.