You can create a simple image gallery within a post in Blog.nus. Just follow this video tutorial.

P.S. For some strange reason, I can't get it to work despite trying it on Firefox 3, IE 6, and Google Chrome on Windows as well as Safari 3 and Firefox 3 on Mac. Still, I've seen it on other blogs around Blog.nus, so it definitely works. There must be something wrong with all the computers that I touch...