Karzilla, Destroyer of Bugs

Also, it looks like the non-Gearman, non-Schwartz workers are: birthday-notify, directory-meta, expunge-users, paidstatus, search-updater, stats-collection, subscribe-hubbub, and t-memlimit. Most of those inherit from LJ::Worker::Manual, but a couple are just doing their own thing. I think these types may be suited for background tasks that are either periodic or asynchronously queued and don't need many bells and whistles.