There are a lot of speculative blog posts out there making arguments both for and against the alleged threat that sufficiently intelligent machines could pose to Homo sapiens sapiens, i.e. modern humans. This is my attempt at explaining why I think that such a threat is extremely unlikely.
I spend a lot of time on the internet, but most of it is not your typical webgeek stuff. Yeah, I do a lot of programming and webdesign, but I don't browse 4chan or 7chan or even youtube. I've recently discovered the webcomic xkcd, however, and although I occasionally miss some of the Jurassic Park/Star Trek humor, most of the other ones are hilarious. This one in particular strikes me as the most clever comic I've seen in quite awhile. To give you an idea of my sophistication in that area, I read Garfield, Dilbert, and Doonesbury daily.