Check for the latest version of DataparkSearch at: http://www.dataparksearch.org/, as well at Google Code: http://code.google.com/p/dataparksearch/.
DataparkSearch is also available in FreeBSD ports collection, see www.freshports.org/www/dpsearch and in the T2 Linux SDE.
DataparkSearch's source is available via SVN at Google Code:
svn checkout http://dataparksearch.googlecode.com/svn/trunk/ dataparksearch-read-only