From the TUs: The AUR has a large number of obsolete packages which could use cleaning up. Examples of packages that may be cleaned up are: - packages that have been renamed or replaced - old and unmaintained developmental (cvs/svn/etc) packages
This is where you can help. Post suggestions of packages in the AUR Cleanup wiki page (http://wiki.archlinux.org/index.php/AUR_CleanUp_Day). TUs will get together and go though the list in a couple of weeks and confirm which packages should be removed. Please do not remove suggestions from the wiki page but add a comment on why it should be kept instead. TUs will take great care not to delete any useful package.