Jimmy Akin has decided to take on Fr. Lawrence E. Mick's perspective on Jesus' presence in the Mass (which can be found in "Finding Jesus in the Eucharist: Four Ways He Is Present." See, also, Catholic Update July, 2005.). Akin's blog entry can currently be found "Christ's Unique Presence In The Eucharist." He cites numerous Magisterial authorities for the understanding one can find in chapter 6 of John's Gospel, the Eucharistic Discourse.
Having read Fr. Mick's article, I can truthfully say his theology is technically correct, and even illuminating to the uninitiated. Nevertheless, it would be easy from Fr. Mick's treatment to obscure the issue raised by Akin, that Jesus' presence in the Eucharistic species is absolutely preeminent, and that the other ways Jesus is present, in the assembly, in the priest-presider and in the Scripture, are ultimately derivative of his presence in the Eucharist.
Akin cites paragraphs 1373 and 1374 of the Catechism, for a more balanced perspective. These paragraphs can point the interested reader to the other relevant Church documents and scripture.