IMO, Wikipedia has more in common with Douglas Adams' Hitchhiker's Guide to the Galaxy (the fictional book featured in the series of the same title, not the work of fiction in which it featured) than Asimov's Encyclopedia Galactica.

My point still applies :) Could you imagine PR companies warring to get their 'native content' into the Hitchhiker's Guide to the Galaxy (the book featured in the series)? Now that would have been prescient.