i submitted one to ezinearticles.com, my question is whether its advisable to submit to a bunch more ?
Nope. Unless you're going to change it enough to not be a duplicate article, you're just wasting your time--as far as SEO goes. Now, if you know of a place to submit that has lots of traffic, there's that angle.
I would advice against it. Be loyal to your clients and it will pay dividends in the long run. I am sure you can come up with several new creative ideas for other sites!
The previous poster is right--unless you "spin" or rewrite the article, it's just a waste of time to submit the same article to a multitude of different article directories. Google will pick one, and discard the others. HOWEVER, you can get around this with a good article spinning service...such as, perhaps, my brand-spanking new article rewriting service, SpunWrite.com. Yes, that was a blatant, shameless plug. Although some might see article spinning as "spammy," (and it can be, when done incorrectly), I view it as a way to free your "message" from the confines of your "words." Good spinning allows you to repackage and redistribute your core message efficeintly, without a lot of effort. Of course, you have to start with a good piece of content. If you're interested, DPers currently get 15% off all orders at SpunWrite.com with the following coupon code: DIGITAL_POINTER. Thanks so much, Paul