If you notice OpenOffice taking a while to start-up even with a 1GB memory for your desktop machine, then you are not alone. This is because by default the application only uses 9MB of the RAM for it's graphic cache. To increase the Graphic Cache, go to "Tools > Options > OpenOffice.org > Memory" and increase the "Graphics Cache" from 9M to about 128MB (Adjust this accordingly depending on your usage and available RAM). Restart OpenOffice and you will notice that the latency has now dissapeared...
While you are at it, the Memory per object setting allocates memory for each object. The default is 2.4 MB which may need to be increased if you are working with high quality images or decreased if you are not really using images and you need to save on memory resources.
Enjoy the extra time you have now save waiting for OpenOffice to start !!