So I don't know about anyone else, but as far as I can tell my own personal true rejection is: It's just too hard to remember to click over to predictionbook.com and actually type something in when I make a prediction. I've tried the things that seem obvious to help with this, but the small inconvenience has so far been too much
Here is the welcome blog post for the new singularity.org.
There's a bug on the media page, and another with blog comments, and these bugs will be fixed later today.