Next would then be to look at startup times for OO and how much time you can save by using the nice prelinking framework that Jakub Jelinek has put together, including the mainframe arch.
I've tried prelinking OpenOffice on my Intel (AMD, actually) PC: The startup time went down from 20 seconds to 16 seconds - or 5 seconds vs. 4 seconds if OO has been started before.
Regards, Stefan Gybas