I like the tabbed dashboard interface (Consoles, Files, Web, Schedule and MySQL). It's very simple and works well. There are links within those sections that take you away from the tabbed dashboard. I would prefer that these be opened in a new web browser tab. I'm thinking specifically of consoles and the file editor. This would mean that my Dashboard is always open on one browser tab and then I can more easily expand my working environment. I know I can use ctrl+click to open links in new browser tabs--I just think the work-flow would be smoother if the links opened in new tabs by default.
I should conclude by saying that this is more of an "icing on the cake" kind of suggestion. I already love using this service.