I'm afraid there isn't one available, although you get asked in the survey section of the ACE exam, "Would you like to go on the list of ACE's?" It's nowhere to be seen. And believe me I've asked.
The only list I know of is the one on acrobatusers.com that lists Acrobat ACEs http://acrobatusers.com/ace-experts
There is also only a list of the Certified Training Providers: http://www.adobe.com/cfusion/partnerportal/index.cfm?event=partnerfind er&showtab=training&
I think that there is a group of ACE in linkedin: http://www.linkedin.com/groups/Adobe-Certified-Expert-ACE-3820125?home =&gid=3820125&trk=anet_ug_hm but I don't know who curates them, or how accurate it is...