Re:Know what, mr.G can help with this (Score 1)

I agree. Take the major search engines, Google, Yahoo, MSN, etc. and look at number of hits, percentage of users that use linux, and you have a relatively accurate number. Sure, you're going to get the same guy from two linux machines but you'll get people with two windows machines and you'll get people with both, and don't forget all the BeOS users =) But it's an accurate enough number for statistics to get a quality "x% use MS, y% use Apple, z% use Linux", etc. which would be good enough for most applications. Sure it won't be perfect, but what polls are? What matters is the overall picture is going to be pretty solid.