An Early Look At New Features In OpenOffice.org 3.1
ahziem writes "With the final release two months away and an alpha version available, it's time to look at OpenOffice.org 3.1's new features: eye candy, better charts, replying to notes in the margin, overlining, macros in Base, RTL improvements for Arabic and Hebrew, and (believe it or not) better sorting. Download and report any bugs you find."
Go-OO is the slowest of all based on these benchmarks from the same site as in the OP.
One thing to keep in mind is that Go-OO is the Novell version of OpenOffice.org and what with the patent threat due to their Microsoft agreement (best explanation of this threat is here) you should be careful not to tie yourself to one particular office suite through proprietary formats. Unfortunately (or perhaps fortunately) the ODF format is like HTML and you can reference and include proprietary files in it.