The enter_bug.cgi interface allows one to enter keywords. Using either my CVS version of Bugzilla (2.17.3+) or 2.16.2 of SuSE, the keywords I entered don't show up in the initial bugmail Bugzilla sends. If the bug is changed, I get the changes plus the addition of the keyword I already entered. So the keyword ends up in the database correctly but is not mailed with the rest of the new-bug email.
Sigh. Bug 180978 was only the first part... Patch coming - did I mention that fielddefs suck?