I made very sure that I did not get involved with any of the commercial Linux companies, exactly so that I would be neutral and not ever seen as "working for the competition".
I don't try to be a threat to MicroSoft, mainly because I don't really see MS as competition. Especially not Windows-the goals of Linux and Windows are simply so different.
A lot of people still like Solaris, but I'm in active competition with them, and so I hope they die.