UPDATED:
The annual meeting of the Medieval Academy of America will be held jointly with that of MAP (the Medieval Association of the Pacific) at the Chaparral Suites Hotel (http://chaparralsuites.com/) in Scottsdale, Arizona, 14-16 April 2011. It will be hosted by ACMRS (Arizona Center for Medieval and Renaissance Studies) at Arizona State University (ASU), Tempe. The updated CFP Deadline is 15 October 2010. Here is the new CFP.
The new deadline was prompted by a protest to move the conference out of Arizona because of recent state legislation; for more, see here at the Medieval Academy site and posts at the blog In The Middle, whose authors initiated the protest.