2011 for mac
OpenOffice is a sack of crap for professional use. i'm a mac user so i have no love affair with Microsoft. If you work in professional environments OO is just shocking in virtually every element except that its free. If you are a mom and pop outfit that just needs to write a few letters or add up your accounts go for it.
right now i'd advise anybody to switch to mac and use office 2011 = menus and full macros