[ThinkDifferent]

And most of the "big iron" guys I've dealt with would never consider risking their jobs on open source code with no support.

"Open source=no support" is a completely false notion. Look at IBM.

[Pessimist]

"Open source=no support" is a completely false notion. Look at IBM"

What about IBM? Do they sell support for Linux? If so, does it end up being much (or any) cheaper than Unix?