Flashblock is a Firefox/Mozilla extension that provides easy and free Flash blocking on a per-site basis so that you can keep Flash switched on in Flickr, but turn it off for sites that use it to spawn popups. Link (Thanks, Doug!)
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.