What are the only article directories worth submitting too?

[learnfromthebest]

I know there are a zillion article directory sites out there, but what are the ones that are proven to drive traffic? What are the only ones worth submitting to? Also, do you use a submitter bot of some type to make it automatic rather than manually going through all sites?

[Peter Adamson]

This may not be a direct response to your question regarding which ones drive traffic, but I have compiled a list with Alexa and PR values. It is sorted from lowest to highest Alexa rank.
Site Alexa PR
ezinearticles.com 408 6
ehow.com 831 4
articlesbase.com 7886 5
clickz.com 11489 7
goarticles.com 16254 3
isnare.com 23788 4
amazines.com 25050 3
articlealley.com 27968 5
articledashboard.com 29632 6
articlecity.com 35985 5

Independently of this list the sites that are reputed to be the best are:
ezinearticles
articlealley
articlecity
goarticles
articlesbase
ehow is really good but you have to write an article on how to do something so it won't work for every type of promotion.

There are also niche sites that are very good if you are in the right niche - eg. afroarticles.com

Hope this helps, and sorry about the formatting, my table didn't come out in the preview!

[nick1123]

Thanks for the list Peter!

I usually just use ezine articles.

[tknoppe]

Yes, thank you for this list! I too primarily use ezinearticles, but your list gave me a few more to check out that I had not heard of. So thanks again.

[Niche]

I hate to be predictable but its ezinearticles for me