I've had the good fortune to collaborate on stage a couple of times with author Philip Pullman (His Dark Materials Trilogy, The Good Man Jesus and the Scoundrel Christ, Lyra's Oxford, etc). He and I first met to discuss Sum at Queen Elizabeth Hall in November of 2009. Miranda Richardson and Jarvis Cocker gave live readings of Sum stories at the event, and pre-recorded readings of stories were provided by Stephen Fry and Clarke Peters.
In May 2010, Philip and I were on stage together at the Charleston Festival of Literature in the south of England. The event was moderated by author and documentary filmmaker Bill Nicholson. See a review of the event here.
I can't say enough about Philip: he is smart, generous, terrifically talented, and a pleasure to collaborate with.