I've made some progress on the Orange Engine, my 2D RPG engine+editor.  You can read about how to download and compile it here (as well as see a couple Youtube videos of it in action):

https://gitorious.org/orange-engine/pages/Home

If you're running Windows, you can download a pre-built copy here:

http://opengameart.org/content/orange-engine-pre-alpha-for-windows

I'm currently looking for people who would be willing to contribute code and/or content, so if that appeals to you, please let me know in a reply or catch my on IRC.