I recently came back to Twitter after picking up the Galaxy Nexus, which makes it all worth it! At any rate, I follow a few heavy metal bands, sports writers and athletes, Anonymous. As for news, I follow Reuters (I actually work for Thomson Reuters). At any rate, I don't know of anybody who would be worth following, it doesn't need to be anybody in particular, just the people you find interesting and engaging.
(I also follow the CDC in case of an emergency zombie infestation)