The USCCB is now podcasting. They now have a podcast of the daily readings using the NAB. They seem to have made available all the readings for the month available at one time instead of releasing them a day ahead like you would expect. Though some people might find their method more convenient.
Of course more than a year ago there was already a podcast of the daily readings using the NAB until they ordered him to cease and desist. Brian Noe who has a great voice is still doing the daily readings at Verbum Domini using I believe the RSV version since unlike the USCCB, the National Council of Churches considered it to be fair use.