Murdoch - 11:30 pm on Jan 15, 2006 (gmt 0)
I think article submission is good reinforcement for holding your place in the search engines. Constant link development is rewarded in all SE's. In order to get there in the first place though you will need some solid links from strong sites, whether they are paid or otherwise obtained. Article submission can keep you afloat, but it won't keep you out of the water. There are many other forms of viral link building though, and many separate techniques can be applied to maximize the effect.