Banned Books Week kicks off today, and the American Library Association's Office of Intellectual Freedom has lots of resources for those who are interested, including a blog and lists of the most challenged books over the past 10 years or so.
The Comic Book Legal Defense Fund, which is a co-sponsor of Banned Books Week, has a comics-specific list on their site as well, compiled by Betsy Gomez. Click on the title of any comic and you will get more details about the book, why it was challenged, and what the outcome was. The list includes everything from J. Michael Straczynski's The Amazing Spider-Man to Alan Moore and Dave Gibbons' Watchmen, and you could do a lot worse than to just spend the week reading those graphic novels.
The CBLDF also has a list of ComicsPRO retailers who are having special events around the country to celebrate banned comics, and offers brochures and other resources for retailers who want to have their own events.