Those who are interested in the current trinitarian debates will want to take a look at a blog post by Lee Irons with a response by Kevin Giles. The issue is whether monogenes means only begotten or unique. Interesting stuff, though Giles thinks that Irons isn’t being quite fair.
For what it’s worth, the debate has driven me, at least, to study the Trinity in far more detail than I have before. And the study is enriching.