I think they'll help you if you want it, here's their email: filmmaui@mauicounty.gov (thanks to Larisie for posting it on CelebAutos ;))
But as I said, the scenes that will be filmed on Maui will not include Mr. Damon. So if you want to contact him this email doesn't help you. If you want to contact someone else, email them They're nice and I think they'll give the address out.
Merry Christmas!
Urša

is there an address for the Maui location?

Same for you ;)
I'll let you know if I find anything new but doesn't look very well for now. We'll see. There's still some time left.
Enjoy!

Thanks Ursha. I guess I will try another place. Have a Merry Christmas.

Hiya!
I'm sorry to say that, but I think it'll be hard to contact him using this venue. I want to contact Matt too but the address is hard to find. At least a valid one. On 12,13 and 14 on January they're filming in Hawaii but Matt won't be there (I contacted the production office). I also contacted Warner Bros Pictures as they are the company that is producing the film but as I expected, I only got an answer they can't tell me any info.
If anyone finds anything please send it my way.
Urša

I was wondering if anyone had any information on the movie "Hereafter." I would like to send a request to Matt Damon. Any help would be nice. Thanks and happy holidays to all.