I wanted to post this somewhere, and it doesn't seem really appropriate for the tip blog so here you go.
I did the abovementioned install last night, and at the configuration tools step the installer seemed to hang. I kept pressing the Next button and it would spin for a while and then stop. I figured it was stuck and left it, intending to figure it out today.
Well, this was running via X to one of our colocated servers, and overnight it chewed up over 4 mbits of bandwidth. Doing what I have no idea; I guess it must have continued to spin periodically. This is going to be one expensive Oracle install! :(
I didn't bother to try to figure out what was going on; I just exited the installer. I think it was finished anyway.
So, word to the wise - don't leave an Oracle installer unattended, it might try to run away with the family silver! :)