I am speaking on this topic this Thursday at Fellowship Bible Church Brentwood, click here for details. If you are in the area, come on out.
Here is a 2 minute video of Tim Keller on the New Atheism. It is important that we engage the issues and arguments (i.e., not demonize critics of Christianity), but do so with gentleness and respect (cf. 1 Pet. 3:15-16):