Susan Crawford, President Obama's special assistant for science, technology, and innovation policy, selected Wednesday evening -- as her boss began the most important speech to date of his presidency -- to return to the micro-blogging platform Twitter. While Crawford's message (see above) simply noted she was watching Obama's health care address to a joint session of Congress from a couch in the Eisenhower Executive Office Building it's worth noting that it was her first tweet in 71 weeks.

Other White House high-tech gurus who used to use Twitter -- like Chief Information Officer Vivek Kundra -- have not resumed tweeting since joining the Obama administration. Crawford's message is also significant because One Web Day, an annual event she founded in 2006 to encourage Internet users to show how the medium impacts their lives, is right around the corner. The Sept. 22 celebration has attracted a global network of partner organizations and individual activists. In 2008, One Web Day organizers documented volunteer-driven events 34 cities around the world.