I know lots of consultants and support people, because hundreds of them have come through my classrooms. One new independent is leaving his Windows roots and supporting Linux. Another long-time indie actively steers clients from (dear God) Small Business Server to free Linux platforms.
Personally, I support any move that frees companies, expands their capabilities and improves their security and stability. But you know that. Don’t take my word for these things; consider the (not disinterested) words of Linuxcareer.com: