The acts_as_solr plugin has a new home, so please make sure you update your bookmarks:
web: http://acts_as_solr.railsfreaks.com
trac: http://trac.railsfreaks.com/projects/acts_as_solr
svn: svn://svn.railsfreaks.com/projects/acts_as_solr
api: http://api.railsfreaks.com/projects/acts_as_solr
The current address (http://acts-as-solr.rubyforge.org) will be obsolete by release version 1.0