What is transhumanism?

Over on rpg.net there's a Traveller thread going on which has included a bunch of transhumanist debate, of sorts. Some people saying the tech assumptions of Traveller are ridiculously retro and out of date, and others sniping at the transhumanism trend, full of fantasy and wish-fulfillment, no more realistic than Traveller and already dying to be replaced by the Mundane SF trend. Which strikes me as nutty.

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Along the way, I had a couple of posts about Bujold and transhumanism. And a brief note on how we're living transhumanism -- or what would be the build up to it if it's going to happen.