It's not just the Catholic Church that is utilising the iPod in its spreading of the word of God. The iPod has also been adapted for Jewish religious study.

ShasPod has been developed by 23-year-old entrepreneur Yehuda Shmidman for those wishing to take place in the Daf Yomi study.

Participants in the Daf Yomi study a page a day of a 2,711-page Jewish oral law compendium. Shmidman's ShasPod allows Jews to study Jewish Law at times when the book would be too cumbersome, for example when commuting.

Taped lectures featuring a rabbi explaining the meaning of each page have been available for some time; there are 2,000 tapes in total.

The 20GB ShasPod condenses all this information onto one iPod, and contains lectures given by Rabbi Dovid Grossman of Los Angeles, it costs $399, $100 more than Apple's price.

Shmidman has sold about two-hundred ShasPods. Customers include the rabbi of Venezuela and Jews in South Africa and the UK, he says.

Orthodox Jews cannot listen to the ShasPod on the Sabbath as they are prohibited from operating electrical equipment. However, Shmidman told Rocky Mountain News that his customers would probably use the ShasPod on Friday morning and Saturday night, thus listening to their daily Talmud lecture while avoiding the Sabbath.