The theologian J.I. Packer, an Anglican, continues the series of essays (the first of which I linked and discussed yesterday) on the Virgin Mary at First Things. The essays are from a joint Catholic-Evangelical task force, and Dr. Packer's essay, while it disagrees with Catholic teaching in a number of important conclusions, is nevertheless a great, thought-provoking read. I highly encourage you to read it, as his insights on the genesis of the scriptural accounts of the nativity story are wonderful.
I think that Catholic-Protestant discussions of this sort are highly productive, and are so much better than some of the bitter conversations Catholics and Protestants have on the web. First Things regularly has ecumencial dialogue in the highest and best sense of the word, and it is simply one of the best magazines in America for any religious person, of any faith or denomination, to read.