Hey Bryce, Just wondering what you would use this for? Seems to me that it isn't any advantage over just putting it outside the module? :S

Sure, perhaps you could dynamically change the theme of a page - but am not sure what else you are planning.

Well, it's a little complicated to explain, but I'll try my best.

I'm proto-typing a simple application database site. One feature I would like is for developers to be able to respond to queries about their apps (in a comments section on each app's page, using a page-based forum), and for their comments to be highlighted as 'I'm the developer of this app'.

The way I plan to achieve this is to use user profiles for developers, and tag their profiles with _dev-myAppName. Then on the app pages I can use a ListPages module to select developer profile pages that have the tag that matches the title of the current page (i.e. _dev-%%title%%). Inside the module will be a CSS module that styles any post containers on that site that have the same created_by_id class as the name of the page selected by the ListPages module, so it will look something like this…

Page-based forum...
[[div class="post-container dev%%created_by_id%%"]]
Post content
[[/div]]

====
[[module ListPages category="profile" tags="_dev-%%title%%"]]
[[module CSS]]
.post-container.dev%%name%% {
/* Style the post container */
}
[[/module]]
[[/module]]

Which would give something like this for an app page…

Page Title = myAppName
----
Page-based forum...
[[div class="post-container dev123456"]]
Post content
[[/div]]

====
[[module ListPages category="profile" tags="_dev-myAppName"]]
[[module CSS]]
.post-container.dev123456 {
/* Style the post container */
}
[[/module]]
[[/module]]

This way there can be multiple developers for a single app (i.e. the ListPages outputs more than one CSS module), and a developer can have more than one app assigned to them (by using multiple tags).
That may or may not help you understand what I'm aiming to do…