Though nowdays they have fairly lost there value but still doing them on smaller scale never hurts. You can check our Directory list http://directories.nbridges.com/ to find good number of directories. Its few months old so few links may not work. I had also purchased a 3000 directory list which you can download from http://www.nbridges.com/files/dirlist.txt .
I have not verified the list but you should be able to get good list of directories from it. You can also get good Directory list from http://www.directorycritic.com/
You can also check DigitalPoint’s Soliciation section http://forums.digitalpoint.com/forumdisplay.php?f=65 . Daily it gets a dozen new directories listed and you can get good free listings in them.