Brian Zwahr has an outstanding Emacs Rocks! type video up on using Paredit and Multiple Cursors together. This is excellent. He shows how to combine simple functions from each into a really powerful tool. Like Sveen’s masterpieces, the video is short (4:07) so there’s no reason not to enjoy it right now.
I really love multiple cursors. Ever since I first saw Sveen demonstrate them in his Web Rebels talk last year, I’ve been awed by how powerful a tool it is. Zwahr’s combining it with paredit, another favorite of mine, just makes both tools better. You really need to watch this video.