Is it possible to have a asset builder page that can upload multiple images?
No.
That answers the question doesn't it 
I figured a short, sweet answer was best. :)’ /> Feel free to fund further development here, though. I’d love to be able to upload a .zip file of images, for example. <img src=‘http://forums.matrix.squiz.net/public/style_emoticons/<#EMO_DIR#>/tongue.gif’ class=‘bbc_emoticon’ alt=’