Greg Koukl is one of the great Christian Apologists of our age. Perhaps he is not the scholar of Alvin Plantinga or Bill Craig, but he is a great thinker and and articulate proponent of Thinking Christianity.
Greg has a weekly radio show (that you can get on Podcast) where he defends and carefully explains what Christians believe and why, as well as having open phone lines for callers.
Greg also has numerous videos on his YouTube channel and a great video presentation on www.Veritas.org that you can watch here (7527 page views to date). (We used this video and notes I wrote out at an apologetics meeting a year or so back.)
I think Greg has been to New Zealand (certainly Australia).
Anyway, here is an article forwarded by a friend, written by Greg Koukl, on “When Tolerance is Intolerant”.