Here at work, we still use RH9.0 on production servers that go into the field (not broke, dont fix it). If we ever need to do a major update due to hardware limitations or similar... and a new distro makes sense, it'll be CentOS (gotta love being the top of decision making hehehe)... it's been rock solid on my remote machines (other than the poor 4.x box heh).
I suppose you are still running Windows 95 on desktops?