@Jamie Im assumning Jason was implying that ImageResizer isnt restricted to "static" images on a page...Im guessing that in his reply if you were to have a database of images that are all displayed on a page using a repeat region (like a photo gallery page) then all you would need to do is create the repeat region and on the image tag just apply the ImageResizer behaviour.
I dont use PCMS at the moment, but I can understand why you wouldnt be able to use ImageResizer with images in that way since all the code for that would be stored in a database rather then coded into the page itself.
Im thinking in theory (and I wouldnt expect this to work) is that if you had all the page content stored in a database (such as using PCMS) then in order to use ImageResizer for any images stored in that way you would need to hard-code the ImageResizer behaviour into the data stored in the database where the image source code would be. Then hardcode the include files of the ImageResizer at the top of the page that uses those type of images....again that wouldnt really make sense though since the whole idea of a CMS is to create content from the website rather then having to hard-code into the database that stores the content :) But I only explained that theory to better demonstrate what would be happening :)
Chris