Open source to hit $22 billion by 2010.

If you're a proprietary software vendor glutting yourself on the success of decades past, yes. By all means keep doing what you're doing. But if you're looking for rapid growth opportunities (i.e., 30% CAGR), open source is the way to go, to the tune of $22 billion, according to Gartner (and IDC)

Interestingly, this number jumps to $41 billion if you add in the $19 billion that enterprises will invest in internal open-source development instead of wasting it on proprietary software licenses, according to Morgan Stanley:

http://blogs.cnet.com/8301-13505_1-9806036-16.html