Organizers of the O’Reilly Mac OS X Conference, which takes place in Santa Clara from Oct. 27-30, have added a new event — “Building Virginia Tech’s G5 Supercluster.” Dr. Srinidhi Varadarajan, director of the Terascale Computing Facility at Virginia Tech, will detail the “challenges, opportunities, and rewards” faced by the project team in assembling the world’s most impressive Mac cluster, which consists of 1,100 dual 2GHz Power Mac G5s. The conference will feature keynotes by David Pogue, Adam Engst, Andy Ihnatko, Tim O’Reilly, and scientific computing presentations on Thursday morning from Apple’s Bud Tribble and Terry Gaasterland of The Rockefeller University.