According to this recent review, writing code to run on Sun Grid is a serious pain in the astral plane ("analysis finds hidden costs in Sun platform" and "Sun Grid requires extensive man-hours and code rewriting to run custom applications").
Apparently, Sun is feeling the heat. As I saw in Greg Nawrocki's post today (and other places, including Slashdot but not Techmeme, interestingly enough), Sun is offering $100,000
Have fun with that!
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