There are a few pure plays of Linux OS companies.

IBM, redhat, Novell, Concurrent computers, and others.

The oldest website that is a forum for investors is Silicon Investor.

If you want to learn investing tools(get rich quick systems), technical analysis, or fundamental analysis; go there.

But more interesting is the forum on these stock, often by employees of such companies. Info is very fast and sometimes accurate.

People often tell woes of what they paid and how many shares.

See you there.