With the new patch, the voices are working!!
In case someone didn't download Kanon yet, here it is, in 2 parts, it's an ISO, contains the voices already. Install, use the Vanilla patch and Enjoy.
Kanon Standard Edition Voiced Part 1
Kanon Standard Edition Voiced Part 2
If you already downloaded Kanon, in the read me of the Vanilla patch, there's a link to download just the voices. (First time I see a translating group offering something like that...)
http://www.zshare.net/download/543037857382147c/
http://depositfiles.com/en/files/syl7uv6p9
http://www.megaupload.com/?d=0QSBUYIA