Sorry I didn't get this up here yesterday. This shows the empty environment with no system loaded. As you can see, it's very similar to the T4Win interface, but there are some significant changes. For example, the Channels, Groups, and Subscribers tabs have grids that let you type directly into the cells instead of into text boxes below the grid (alothough this isn't fully implemented at the moment), and the System Manager shows sites as nodes under the parent system. The screenshot was taken on Saturday, before everything was wired up with the new GUI.
I'll try to get to a point where I can get some decent screenshots of the program actually running, but you can get a general idea of what it looks like from this one. I still have a bunch to do before I can release it, and it looks like I won't get to that point until next week since I've been slammed at work.