(Reposting this from the LSAT Discussion board, since it's useful here, too.

)
If you're thinking about taking the February 2011 LSAT, you need to start keeping track of important Feb11 dates. From LSAC.org:
February 2011 Test Date: Saturday, February 12, 2011 (Monday, February 14 is an alternate test date for Sabbath observers)
REGISTRATION DEADLINESRegistration Online, by Mail, or by Telephone: January 11, 2011 (receipt deadline)
Late Registration by Mail: January 18, 2011 (receipt deadline)
Late Registration Online or by Telephone: January 21, 2011 (receipt deadline)
OTHER IMPORTANT DATESTest Center Change by Mail, Phone, or Fax: January 21, 2011 (receipt deadline)
Test Center Change Online: January 23, 2011 (midnight ET)
Test Date Change by Mail, Phone, or Fax: January 21, 2011 (receipt deadline)
Test Date Change Online: January 23, 2011 (midnight ET)
LSAT Registration Refunds (partial only): January 21, 2011 (receipt deadline)
Cancel Registration Covered by Fee Waiver: January 21, 2011 (receipt deadline)
Source:
http://www.lsac.org/JD/LSAT/test-dates-us-feb11.asp