I found a very nice blog that can help with pronunciation. Despite the title, Spanish does not appear to be a prereq.
Many of our students who study Portuguese have previously studied Spanish. If you know the differences between por vs. para, ser vs. estar, preterite vs. imperfect, and subjunctive vs. indicative, you already know a lot that is transferable to Portuguese.
Portuguese pronunciation is more of a challenge than grammar. We provide learners of Brazilian Portuguese with practical lessons that show pronunciation differences between Spanish and Portuguese – that, in a nutshell, is the objective of Tá Falado: to provide help in learning the sounds.
Tá Falado podcasts are built around dialogs that illustrate specific sound differences. Users can download PDF transcripts and participate in a discussion blog for clarification of questions. Additionally, all of the dialogs present cultural scenarios designed to show some of the differences between the U.S. and Brazil.
Try it out, and join our Brazilpod community. There are no registration fees or restrictions. Tá Falado, it means “it’s all been said.” We invite you to join the discussion.
Also check out this site at utexas.