The VSL (Virtual Steganographic Laboratory) project has started on SF. Its main purpose is using, testing and adding new techniques both for steganography and steganalysis for digital images.
Many steganographic application are usually command-line tools or very simple GUIs which consists of one choosen method. VSL provides framework for complex yet simple to arrange experiments and methods testing. It can use many methods simultaneously and everyone can add a new one.
Application is under heavy development since September 2008 and will be availaible soon, so stay tuned.