"It's time to have David Pearce do a TED talk! Humanity is ready for the idea of a more integrated, blissful, and cruelty-free world identity, and David is the right person to speak of that direction within Transhumanism. There is already intense focus on longevity and artificial intelligence, yet the focus on improving upon the "normal" subjective quality of life is sorely missing within mainstream science. For example : the FDA only allows the development of medicine intended to treat a CDC designated disease - effectively preventing improvements upon the baseline hedonic set point and the efficiency of the aversive/motivational system. TED is the perfect place to help break the taboo on public discussions of pleasure and suffering and the need to use biotechnology to address the problem. Here's how you can help make the event happen :-> go to the following link and submit a nomination for David Pearce to speak at TED ;

http://www.ted.com/nominate/speaker

you will need the following basic info ;

Dave's email address : dave@hedweb.com

UK Phone number : [+44] (0)1273 699 055

Link to his site and talks : http://www.hedweb.com/confile.htm

Youtube clip of one of his talks : https://www.youtube.com/watch?v=3WSq7ojGnck

Many more examples can easily be found through a google search.

Bostrom has given one. Pearce is a great idea.
I'd have to assume that they asked Singer and he declined. I can't imagine them having just ignored him.