My MacOS X

Snow Leopard’s Terminal has a new very useful feature “SPLIT” / “COLLAPSE” as in many text editors. Check out the split/collapse window buttons here above the scroll bar:

Click the top “split” button or press Command+D shortcut and now you’ve got your window split into two usable panes like so:
To collapse the window press Command+Shift+D

ALso, you can do multiple splits. Aside from general speed increase I think split pane in Terminal is my new favorite feature.

See the Terminal Splits Windows Movie: