What role do article submission directories play in SEO?
I'm interested what the consensus is on the likes of ezinearticles as a form of backlink building. There are a couple of similar questions here but given google's recent panda update apparently targeting article directory sites I'm not sure where this stands. I realise there are better backlinks, from established sites etc, however this is one approach that is consistently recommended around the internet.
My current situation is I'm at position 16 of google.com for a keyword with 2.6 million searches a month. I had intended this month to publish an article or two each day on ezinearticles then duplicate on a couple more but before I set upon this tedious task, would I be wasting my time?