Playboy (search) is again proving again the axiom that sex sells.

The adult-entertainment giant is offering digital downloads of its sexy models in varying forms of undress to be viewed on Apple Computer's newest gadget — the iPod Photo hand-held viewer (search).

The downloads of Playboy models — called "iBods" — will be a regular for iPod Photo owners.

To get the exclusive shots, users must be members of Playboy's Cyber Club (search), at about $19.95 per month. Free photos involve only semi-clothed models with no nudity.

Playboy said the iBod feature is meant to show techies how readily available Playboy's content has become for the new portable devices.