this is one of the best articles i've ever read regarding this subject. i used to be a supporter of transhumanist ideals when i was in college...but that's only because i never fully understood the negative aspects that would come from it. that's because transhumanists rarely talk about the negatives openly to the public. but if they do, they'll always pitch it as a necessary step for an overall greater good...they even make it sound inevitable.
basically, transhumanists want to make a paradise on earth. but there's a catch...the overwhelming majority of the people on earth are not invited. go figure!
the article is lengthy, but its well worth the read[You must be registered and logged in to see this link.]
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