Linux opportunity buried in Unix market share data (CNET)
For those wondering how big Red Hat and Novell can become on operating-system revenue alone, keep that $61 billion number in mind. Most of that $61 billion is hardware-related, but it meant approximately $650 million in Linux server sales for Red Hat and Novell over the past year. As Linux eats into Unix, Red Hat and Novell can expect to grow linearly with it."