There is a school of thought that having an inline linked image (an image loaded via the img tag, rather than via css background attribute) at or near the top of your document markup, which has an alt tag containing your site's primary keyword phrase, gives your site a boost in terms of SEO.
I've seen the apparent benefits of this technique first hand and believe it definitely has merit.
However, since I'm keen on using CSS and background images for every image except those inside content, I have no images in my theme to apply an alt tag to.
Is there an SEO friendly workaround when using CSS exclusively for image display?
Curious what others thoughts are on this.
PS: Using css has its own inherit SEO benefits such as streamlined, semantic markup that does not dilute the actual "content" on the page that the search engine really want to index. I get that and am a huge believer, and advocate of CSS in this regard. Just looking for some ideas I'm not aware of to have the best of both worlds.