You might like to have a look at the prayer material on the excellent pray-as-you-go site. Each weekday there is an audio reflection which you can listen to at your computer, or download, a week at at time, to your iPod or other MP3 Player.
Details of the special Advent reflections, based on themes in the Pope's latest encyclical, Caritas in Veritate (Charity in Truth) can be found here.
