There has been much in the blog world in response to Richard Dawkins and his book 'The God Delusion'. Alister McGrath also a professor at Oxford and contemporary of Dawkins has written a new book, 'The Dawkins Delusion?'. If your looking for a short and comprehensive response to Dawkins, this book seems to do the job (96 pages).
Over the years I've interacted with many christians who find that once something is in a popular book (the Davinci Code, the Gospel of Judas) it is something that must be true/taken seriously, and even more so for a book by someone as clever as an Oxford Professor like Dawkins.
Richard Dawkins is interviewed by Stephen Colbert on Comedy Central's 'The Colbert Report, you can see the entertaining video here.