there is a built in limit to attachments on a post, but images can usually by-pass that. you can just make a post and leave the images as attachments; they are small until you click on them, so it doesn't take up too much space on the page. why it isn't used very often is a mystery though. i used that feature a couple of times and i've seen others use it from time to time. i guess it isn't very well known or something.Kinda annoying scrolling through comments in a post and like one person has a comment of two BIG "portrait" images taking most of the page.