First, from Rosary Army you can download the rosary for every day of the week. Awesomely enough, it takes the exact amount of time for them to say one rosary with me on the MP3 player as it does to walk from our house to my office.
Next, we have a group who have been recording the entire Liturgy of the Hours for EVERY DAY! That really helps me stay on track for praying the Divine Office.
How about a monastary that records their daily office and shares it with us?
EWTN offers a lot of interesting things, including quite a few offerings from one of my favorite priests, Father Mitch Pacwa.
For the classical music fan, I found Classic Cat - the largest collection of free (legal!) classical music up on the web.
And finally, I must talk about my favorite find so far - SaintCast. This is an amazingly well done podcast that deals each weak with a different Saint and about teaching us about the Communion of Saints in general. Check it out!