It's difficult to constructively respond to your post for a couple reasons:
1) As someone who does SEO for a living, I'm not sure what you mean by "basic SEO". That could mean just filling in meta-tags and repeating keywords in the site's content, or it could involve a dozen other things.

I don't think you mentioned anything about an external linking campaign--namely, getting a link to your sites posted on other websites that would be considered relevant and well-established. Google views incoming links to your sites as votes of confidence, and factors them into its ranking formula. Regarding search engine optimization, the second thing I'd want to know is if you've chosen keywords to use on your site that your prospective customers are actually searching for. Many ecommerce business owners make assumptions about what keywords their prospective customers are typing in the search engines, but if you haven't researched it, chances are you're way off the mark or you're choosing keywords that have so much competition that you'll have to struggle to make it to page two or three of Google search results (which keeps you pretty well hidden from most search engine users.)
2) I looked for your website URLs in your forum post and profile to take a quick look and offer some specific feedback. Unfortunately, I couldn't find your web address(es) listed anywhere, so it's difficult to give you any meaningful suggestions about your ecommerce marketing strategy

That being said, I'd recommend creating and posting as much keyword-rich, original content on your sites, which your site visitors would consider useful, interesting, or entertaining. Here's why: When other webmasters or bloggers like your content and want to share it with their own site visitors, they'll very often post a link to your web pages on their site. That not only results in some direct click-throughs, but, depending on the quality and relevancy of their site, it may also result in improving your "link popularity" and raising your rankings in Google.

So why don't you post links to your site and see if anyone offers some useful ideas or constructive criticism.

Hope that helps!

Mountain Media
Web site Design Ecommerce Hosting

http://www.mountainmedia.com

Edit by admin: one link per domain please, and do not link in posts unless asking for a site review.