Deletion API documentation here: http://drupal.org/node/153904
Before doing anything else, we should fix http://drupal.org/node/154046
Additional links to issues:
nodescomments- users -- http://drupal.org/node/154033 -- RTBC
- taxonomy terms & vocabs -- http://drupal.org/node/154128 -- RTBC
- content types -- http://drupal.org/node/154135 -- RTBC
- roles -- http://drupal.org/node/154266 -- RTBC
- blocks -- http://drupal.org/node/154275 -- RTBC
- menu items -- http://drupal.org/node/154473 (pwolanin handling this - but waiting for http://drupal.org/node/151583 and http://drupal.org/node/146425)
- path aliases -- http://drupal.org/node/154517 -- RTBC
- contact forms -- http://drupal.org/node/154277 -- RTBC
- aggregator feeds & items *looks tricky*
- blogapi node deletions -- http://drupal.org/node/154341
- book module outline deletions -- pwolanin will do this IF this patch goes in: http://drupal.org/node/146425
- filters -- http://drupal.org/node/154281 -- RTBC
- forums -- done, patch pending
- languages/translations -- http://drupal.org/node/154872 -- RTBC
- openID users -- http://drupal.org/node/154874 -- RTBC
- profile fields -- http://drupal.org/node/154350 -- RTBC
- user rules -- http://drupal.org/node/154324 -- RTBC
- translation nodeapi deletions -- http://drupal.org/node/154354