Anyone interested can follow the Town Hall three different ways: Watch the event live at , follow live tweets from @townhall, or search tweets with the hashtag #AskObama.

Social networking sites, such as and Twitter, are taking on a great importance in the runup to the 2012 presidential election.

In April, Obama held a with audience members at Facebook's headquarters in Palo Alto, Calif. With Facebook co-founder Mark Zuckerberg moderating the event, the president took questions that people had posed online, as well as from members of the live audience.

Sharon Gaudin covers the Internet and Web 2.0, emerging technologies, and desktop and laptop chips for Computerworld. Follow Sharon on Twitter at or subscribe to . Her e-mail address is .

in Computerworld's Web 2.0 and Web Apps Topic Center.