OMZen - 5:57 am on Jun 15, 2010 (gmt 0)

The ONLY article directory i submit occasionally to is ezinearticles.

99.99% of articles directories do not have enough link equity to go around and your article quickly gets buried deeper / pages go supplemental.

Better to keep the quality content on your own domain, or do selective guest blogging with QUALITY bloggers which will give you both quality backlink as well as distribution.