A February 2008 story on Task Force's call for comment on the proposed revisions is a useful perspective. Click here for story.
Go straight to the source. If you go here and click on the Blue Book, you will get a very large pdf. file. Go to page iv and click on the link in the index for Task Force for Disciplinary Policies (Title IV Revisions). This gives more background right from the source.
The current proposed revisions (which evolved into the ones that came to Convention in 2009) grew out of an attempt to revised Title IV at the 2006 Convention. See stories here and here.
Title IV was last revised in 1994. Click here for story