Well, WPBlacklist 2.9 with support for WP 1.5 is here The only new feature in this release is the addition of support for running trackbacks and pingbacks thorugh the blacklist. Unfortunately, this release probably will not work with WP 1.2 – I haven’t had the time to test it or to find a means of ensuring backward compatibility. It however does work pretty well against the new trackback spam :p You can download it from the WPBlacklist page