Radtech's Podsleev
just like sonofslim said, the Radtech's Podsleev is the best one that I've ever seen, but if you want something that is some what shock resistant and that it does not slip of the sleeve or case easily, go for the exo. I like it but it adds thickness, sometimes it feels that I have 2 ipods on my hand or a first gen ipod.
if you are an active person and like to carry ur pod everywhere, exo is the one, DLO jacket is a sleeve that is thicker.
I no longer use the exo because I find that it's too big and dumb to carry it around. I made myself a bag that is fit. I took my oakley's bag and made it shorter and the thing is that it's good to clean the chome.
if you are a person who like to have it in the pants, go naked, if sleeve is ur choice use the radtech =)
if you want to prevent dirt at all cost and don't mind that extra thickness and weigh, exo2 is ur winner
the radtech has a clear screen unlike the DLO and reduces the sensitivety so u won't operate it by actident.
but remember that the DLO and exo makes the buttons deeper to dig