To see the latest changes, check out the release notes.
There is a document for every release of searchmonkey, or see:
  http://searchmonkey.sourceforge.net/index.php/Searchmonkey_Installation#Release_Notes
for the full list.

For code checked out using subversion, get a live change log with:
 $ svn log . 
from within the check out directory, or to see the online log use:
 $ svn log https://svn.sourceforge.net/svnroot/searchmonkey/trunk
to see trunk changes to date.