I put together a collection of resources related to Christmas apologetic issues in a 2008 post. And here's a 2009 post that supplements the earlier one.
After that 2009 post, I wrote an article about what sources other than Matthew and Luke report concerning Jesus' birthplace. And here's a post on the nature of prophecy fulfillment in the infancy narratives. Here's a post related to the December 25 date and its alleged pagan origins. Here's one on the supposed anti-Semitic associations of the holiday. I replied to some of Robert Stovold's arguments against the infancy narratives here. Steve Hays replies to Paul Tobin on the infancy narratives here. And here's documentation of Paul Tobin and Richard Carrier contradicting each other regarding Luke's census. Here's a post I did on the historicity of the Slaughter of the Innocents. Lastly, here's one that summarizes the state of the evidence related to the census of Luke 2.
In addition to the posts mentioned above, we published an ebook titled The Infidel Delusion, which addresses some issues relevant to the infancy narratives.