IDG World Expo today announced that Wil Wheaton–actor, author, comedian, blogger and self-described geek–will deliver a special feature presentation at Macworld Conference & Expo. Wheaton will discuss his personal story, as well as the joys of Web design, HTML and blogging–as described in his critically-acclaimed book, “Just a Geek.” Macworld Expo runs January 10-14, 2005 at the Moscone Center in San Francisco.