I generally don't jump on boycotting bandwagons, usually because they are severely misguided and misinformed, and they're usually interested in spreading FUD more than just reporting the issue at hand. However, on December 29th, 2011, I will be transferring all of my 15 domains away from GoDaddy, because they support the SOPA and Protect IP bills. You can read more about this at http://www.reddit.com/r/politics/comments/nmnie/godaddy_supports_sopa_im_transferring_51_domains/. Further, there is a boycott site for boycotting GoDaddy, where you can pledge that you will be moving your domains. This site is found at http://godaddyboycott.org/.
December 29th is the day, if I don't feel the itch to do it before then.