One change is just begging to be made: the Tools tab is way too meager to deserve its own big tab. I'm sure the content there could be moved to a sub-tab of App-Settings, or somewhere else in a sub-tab.

I think a far more worthy candidate for "big tab" status is the Plugins sub-tab. Pretty soon Plugins are going to be essential to getting the most out of b2e. I think it should be a tab that is highlighted accordingly rather than a buried sub-tab.

Also on the Plugins tab, it might be a good idea to have a direct link to the Plugins repository, and perhaps other Plugin info/sources that might be appropriate. Sort of like how Firefox has a link to find more Extensions in their Extensions menu.

Another possible tab change would be to sub-tab the Templates tab (since it's designed to work only with the custom skin, and is not encouraged to be used anyway).

The Comments sub-tab might deserve promotion to a "big-tab", also.

Just some thoughts to consider! :D