My column about  science fiction folks worth following on Twitter is up on SciFiWire.com. It's a pretty expansive list, with 18 people in the main story, and another five that didn't make the active list, but were still worth noting. This pretty big project -- you wouldn't think it would be, Twitter being Twitter -- but it takes a goodly amount of time to find, follow and read this amount of Twitter feeds (actually, there were more than this during the research phase).