If you’re not familiar with Simple Viewer or Postcard Viewer, they are great little Flash-based image gallery applications made by Airtight Interactive. They’ve always been pretty easy to use, but they did require you to make your own Thumbnails, and edit the XML files for the shows you want to make, or to install certain server-side scripts.
Fortunately, thanks to this great tip over at MacOSXHints.com, I discovered a great iPhoto plugin called Custom HTML Export. It allows you to export these two great flash galleries (among others), directly from iPhoto… No coding required. Best of all, it’s free!