Perhaps as an antidote to the Handbags Haka previously mentioned, the All Blacks have taken to using a version of the Haka which includes a throat-slitting gesture at the end. Very friendly. Australian coach John Connolly has criticised their decision to go away from the usual Ka Mate version, but Graham Henry's having none of it.
Sounds like a verbal version of Handbags At Dawn, to me ;-)
Here's a photo of our brave boys facing up to the Ka Mate menace, last time the New Zealanders visited Twickenham.