I'm a sucker for time jokes.
In June, 2009, David Eagleman collaborated with musician/producer Brian Eno to perform a musical reading of Sum to 1,000 people at the Sydney Opera House. In May of 2010 they performed together again to 1,200 people at the Brighton Dome in England. Stay tuned for further performances.
Sum was the only book of fiction in New Scientist magazine's selection of Best Books of 2009.
In September, 2009, Sum became the number 2 book in the United Kingdom on Amazon's bestseller list, only behind Dan Brown's Lost Symbol.