Excellent podcasts for learning pronunciation

I've been working with a series of podcasts called Tá Falado that are really good.  Although it says they are designed for spanish speakers, the explanations are all in english and I think anyone can get good use out of them.  In each lesson they have a dialog that is used to teach specific sounds in brazilian portuguese, many of them quite subtle, like open 'o' versus closed 'o'.  They then translate it into spanish and compare the sounds between portguese, spanish, and english.  Even though I don't know that much spanish, I think a lot of us in the US at least have a decent knowledge of how spanish sounds.  My own tendency when first learning portuguese was to pronounce everything like it was spanish, with those nice consistent vowel sounds, so this podcast really helped me hear the difference.  Plus I like that they occasionally bring in speakers from other parts of Brazil, so you can hear for example how the sound of 'r' changes from region to region.  The accompanying pdfs are very helpful also.
I think my portuguese pronunciation has improved quite a bit since working with these.