If you go here and then click through to view event details on any SXSW "interactive" panels you're interested in, you'll find the hashtags listed for each event, if you want to follow along on Twitter (although some of the tags are beyond clunky—"#greatinterviewsadvice"? Ummm, no). I've been following #futurebook, a panel on the future of book publishing, and keeping track of updates from insightful Eugene Weekly arts and music editor/fellow cat lady @theothermolly. Don't forget about time zones when you're looking at that schedule.