The American Library Association's national banned books week started on Saturday September 24th and runs until October 1st. The week is meant to celebrate the freedom to read and brings attention to the issue of intellectual freedom and book banning.
During this week bookstores and libraries throughout the United States prominently display books which have made it onto banned books lists or which are in danger of being banned.
A map of the book bans and challenges from 2077-2011 in the US can be seen here. The ALA has also set up a YouTube channel which features videos of people reading excepts from banned books. You can also follow and comment on the week's events using the twitter hashtag #bannedbooksweek