i don't think its about hairiness. its about things like legacy code, speed/efficiency, knowledge base, etc.. fortress isn't ready yet, hadoop is java-based (

i don't think its about hairiness. its about things like legacy code, speed/efficiency, knowledge base, etc.. fortress isn't ready yet, hadoop is java-based (which means slower performance and possible code rewrite), and occam can't jump through the same flaming hoops that C/fotran can (i think -- i'm going on word of mouth). these are all great tools for HPC, but i don't think that they line up with the needs of existing scientific programming. fortress will, though, most likely, once its ready.