Well, now that everyone is on the subject of tabs, I thought I would suggest being able to rearrange them. The idea is simple. You can click and drag a tab to another place, before or after other tabs, to reorder it. This would affect both the position of the tabs above the main pane, and the numbered order of them in the "Window" menu.
I don't really know how feasible this would be to implement, but if possible, I would suggest it be done at some point. I have always liked how I can rearrange the tabs in browser windows, so I'm sure it could be useful in Dream Maker.
Let me know if this can be done.