You might want to check out www.best-web-directories.com or any other mass directory list/review website. Oh and LinkAlliance.net
http://www.best-web-directories.com/ and http://info.vilesilencer.com/ are both unbiased indexes of directories. I'm not sure about the owners but I know they are both DP members and have a pretty high level of integrity (from what I hear )
I know that DMOZ is used by Google and a bunch of others but DMOZ is a mess. It takes forever to get listed in most categories from what I can tell. They also seem to have too many dead sites still listed.
I would have to say http://botw.org mainly because they are still around and have done very good for themself as well as provide great value.
you should all visit this thread http://forums.digitalpoint.com/showthread.php?t=147676 It contains a list of 3000 directories and is getting pretty good reviews
It's a good start for sure. And I'm sure, that Matt will categorize or do something in order to let webmasters find the most useful directories first.