The folks at Creative Commons are beginning a process to revise their licenses. In the true spirit of open, they are asking for input from anyone who has a proposal, concern or any other input regarding their licenses. After gathering information for two to three months, they will publish at least two drafts of the licenses before making them final some time late in 2012.
For a full description of Creative Commons objectives, process and expected schedule, go to their 4.0 wiki homepage. It is a very inclusive process, and while the discussion may jump way down into the IP weeds, it is important for all concerned to provide input.