Here is a small tutorial for you.

SEO - its a big part of the theme, right?

You can do a lot of cool things with feeds. Technically they are a version of XML which carry lots of info for machine use. Similar to how your sites communicate.

Wordpress has a set of feed types it uses. Here are some examples:

http://example.com/?feed=rss
http://example.com/?feed=rss2
http://example.com/?feed=rdf
http://example.com/?feed=atom

http://example.com/wp-rss.php
http://example.com/wp-rss2.php
http://example.com/wp-rdf.php
http://example.com/wp-atom.php
Lets start by showing you a few "variables" to trigger certain types of feeds.

Your image page is technically a custom post type called "image".

post_type=image ...means something to wordpress.

So, a basic "image" feed:

http://www.clipartillustrations.com/feed/?post_type=image

It also works out that this shows your images from "latest" and onward. So your users, if subscribed, can see if you have new images.

Your images are indexed by a custom taxonomy called "image-tags", which are whatever keywords you've chosen:

image-tags=white

http://www.clipartillustrations.com/feed/?post_type=image&image-tags=white

The first part separating your variables from the URL is a "?" after that you can separate them with "&" as you can see there.

To take it a step further, you can feed it to www.feedburner.com which also has useful features that you can use for promotion.

You can also plug your feed into the RSS widget to show new images coming into your site. A bit further, you can also plug your network buddies feeds into your site! How cool is that?

Feeds are not just for humans - different search engines and services will spider your site and even sometimes rip content (thats not always a bad thing) which promotes you as well.

Feeds are just really useful in general - you can totally make up new ideas on how to use them to promote.

For instance, lets say you have some sort of article site (or you intend to be a hub site) you can actually "aggregate" your newest images as blog posts on that site.

http://wordpress.org/extend/plugins/wp-rss-multi-importer/

As you probably know, wordpress was chosen because it has so many powerful features. I hope you guys can use this to get your work out there and gain an advantage through technology, like Kip did in Nepolean Dynamite.

Napoleon Dynamite - Kip's Wedding Song to Lafawnduh [HD] (The video's owner prevents external embedding)

http://blog.example.com/feed/?taxonomy=taxonomy-name
If you are unsure which name a category a name has, you can just copy/paste the slug from your category admin area.

For instance, featured images:

http://www.clipartillustrations.com/feed/?image-type=symbiostock-featured-images

If you have "Animals Images" then it would be "animals-images" or whatever the "slug" for that taxonomy is. The name may also work (with hyphens or possibly "+" signs.

You will get the hang of it

Edit: Here is another one I snatched from category area: http://www.clipartillustrations.com/feed/?image-type=da-vinci-images

Sometimes they might not "look" good but they are still valid I'm sure.

You may also be able to get a plugin which adds "featured images" to your feeds, and that might also dress up your custom post type feed a bit.