Squidoo allows you to add images to your lenses through the basic Text/Write module. Additionally, you can add images to other text areas using some basic html.

Resources:

Linked Images - How to add links to images so that when you click on the image you are taken to a desired site.

Add Photo - Jack Lee's lens on Adding Photos to Lenses

Basic HTML for Squidoo - An excellent overview for all of the HTML allowed in Squidoo.