I saw that [color=#FF0000]smanzari[/color] had already posted that they are not passing on fanmail, but here's what I found in case anyone wants to try anyway:
RESIDENT EVIL: AFTERLIFE
Feature
Davis Films/Impact Pictures
Prod: D. Carmody, J. Bolt,
R. Kulzer
Dir: Paul W. S. Anderson
Cast: TBA
PM: Ronald Gilbert
PC: Melissa Girotti
Shoot: Sept. 23 – Dec. 22/09
30 Booth Ave., 3rd Flr.
Toronto M4M 2M2
T: 416-462-1914
F: 416-462-3924

Here is the Info I found so if anyone else wants to call:

Davis Films/Impact Pictures
Resident Evil: Afterlife. Feature.
Sept. 23 - Dec. 22, 2009. Toronto.
(416) 462-1914.

I just got off of the phone with someone and they are not passing on fanmail to actors/actresses and would not share an address...

It is filming! I cannot find an address but I have found a phone number- pm me if someone wants to call it and see if they can get an address!

I haven't had any info on this film so it is filming out of the U.S.

I would like to know as well now that it's being classified as 'filming'

i know imdb reports this to be in pre-production, but i think it should start filming soon or could possibly be filming now. does anyone have an address to this and know if fanmail will be passed on?