The content of the arguments has been effectively refuted already, but I have one thing to add. The piece, and especially the comments section on Stross' site, really need to sort out their terms. They all seem to be equivocating between intelligence and consciousness. Something can be a really powerful optimization process without having humanlike emotions or thought processes.
I periodically get email from folks who, having read "Accelerando", assume I am some kind of fire-breathing extropian zealot who believes in the imminence of the singularity, the uploading of the libertarians, and the rapture of the nerds. I find this mildly distressing, and so I think it's time to set the record straight and say what I really think.
Short version: Santa Claus doesn't exist.
- Charles Stross, Three arguments against the singularity, 2011-06-22
EDITED TO ADD: don't get your hopes up, this is pretty weak stuff.