Hello all,
We released a new plugin (CE Image extension) that can re-size multiple images.
Devot-ee Link: http://devot-ee.com/add-ons/ez-image-resize
EZ Image Resize brings the best features of CE Image into your text, text-areas and WYSIWYG field types. Allowing you to control image size, quality and much more inside of a multi-image field like WYGWAM.
Docs: http://viminteractive.com/ee_addons/docs/ez_image_resize/