There are going to be even more ways to meet Oracle ACEs at this years OpenWorld. The OTN Lounge is going to have some time slots where you can meet and chat with Oracle ACEs about any subject you want. See here:
Some Oracle heavyweights have already signed up for the sessions. If you’re and ACE, sign up. It’ll be fun.
Of course the most important thing is that people turn up with questions. Don’t be shy… 🙂