Dev Build 2101
is out now, with an improved status bar.
Apart from the status bar, the most noticeable change is that closing the current file via a key binding will select the previous file (in the mostly recently used stack), instead of the neighboring file. This was always the intended behavior, there was just a typo preventing it from triggering previously. One of the more debatable elements is that the behavior is different when closing via the mouse: here the neighboring file will be selected. I can't remember the justification for this, as the code was added a long time ago, but it may well be changed in a future build.
The OS X key bindings for Add Next Line / Add Previous Line have been changed due to a clash with inbuilt Lion key bindings.
On the theming side of things, there's now a status_button class available to customise the appearance of the clickable areas on the status bar.