How would I list assets from a specific subfolder?
You could use the folderId-parameter in craft.assets:

{% for image in craft.assets.folderId(1) %}
    &lt;li&gt;&lt;img src="{{ image.getUrl('thumb') }}" alt="{{ image.title }}"&gt;&lt;/li&gt;
{% endfor %}


You can get the folderId by inspecting the folder-name in the CP.