You know, it would be a bit strange if IBM (or grid.org, whatever) would rush development for a linux version, just to make it possible for /. to throw them off the charts entirely. Surely, some corporate prestige is also involved. I sincerely hope that the linux version will come out one day, but I`ll believe it when I see it, and even then I think it will only come out when IBM is well up to take on the challenge.
My eurocents.
I'd hope the good that would be done from a Linux client would be enough for IBM et. all to swallow their pride, think of all the computing power and free publicity that would come their way from /.