I'd recommend these:
http://directory.v7n.com/ - Sure, it's mine, but it is also a damn good directory. Quality web directories don't happen by accident, and running a crap directory is a lot easier than running a quality one.
http://www.rubberstamped.org/
http://www.avivadirectory.com/
http://www.alivedirectory.com/
http://www.umdum.com/
http://www.sevenseek.com/
http://dmoz.org/
http://dir.yahoo.com/