Nitrozac and Snaggy, creators of The Joy of Tech comic series, are celebrating MacWorld Expo week by holding a virtual book signing. They will be signing copies of their new book, “The Best of the Joy of Tech,” and broadcasting the feed from their Webcam and simultaneously on IRC and iChat (chat room “joyoftech”). Just released by O’Reilly, “The Best of the Joy of Tech” book features the best and most beloved Joy of Tech comics, printed in full color, and includes an introduction by David Pogue and a foreword by Steve Wozniak. If you’d like a copy signed and personalized online, you can purchase one at their Web store, or, if you pick one up at O’Reilly’s MacWorld Expo booth, the pair will send you a customized digital inscription that you can print out on label paper and stick in your book. The signing is scheduled for Wednesday (today) at 10:30 a.m. PT.