THIS SHOW ROCKS!!! Much different from the normal action/battle oriented anime!

http://animesuki.com/group.php/209.html

A group called C1 is subbing it. I've never heard of them and will put in my two cents on the quality and all that when I get around to watching it. The following is their synposis ripped from their website.

http://www.c1anime.net/
------They are neither plants nor animals. They differ from other forms of life such as the micro-organisms and the fungi. Instead they resemble the primeval body of life and are generally known as "Mushi". Their existence and appearance are unknown to many and only a limited number of humans are aware of them. Ginko is a "Mushi-shi" who travels around to investigate and find out more about the "Mushi". In the process, he also lends a helping hand to people who face problems with supernatural occurances which may be related to the "Mushi".---------

EDIT: C1's quality is actually pretty good. I don't know much Japanese but they seem to do a good (and detailed) job of translating and subtitling. Other groups have started to sub this show as well, including ANBU and AnimeForever.