@tsarstepan,
i carry my ipod touch in my front left pocket (and nothing else, keys and change go in my right), i got a nice thin silicone skin that covers everything but the face, i've thought about getting some face covers, but so far no real marks to speak of, the skin cost about 10 bucks at Radio Shack (or The Source as they're now called in Canada)
i'll see if i can find the exact model later
(i also don't use the ipod headphones, i use a sony pair with a right angle jack (i.e. not straight like the ipod jacks), i find they're better for pocket carrying)