"Start center and new look and feel welcomes you to OOo
The changes made from OOo 2.4 to 3.0 aren't as all eye popping like
from the changes Microsoft made from Office 2003 to Office 2007.
OOo 3.0 still has the traditional file menus and toolbars--no
Ribbon here. The open source developers madeover many toolbar icons
to give them a more modern look. Plus when OOo is opened without a
document, a start center (see Figure 1) is displayed instead of a
blank application. This center makes the office suite a bit more
user friendly and inviting. You can hit the buttons to start or
open documents, manage templates, or browse Extensions.
"Installs on Mac OS X (without X11)
Though you could install OOo on Mac OS X machines in the past, you
could only do it with help from X11. This is an implementation of
the X Window System, that makes it possible to run X11-based
applications in Mac OS X. Starting with OOo 3.0, you can install
the suite without this dependency."