You can't see it at this distance but they are wearing one of two pairs of Peltor MT7 low profile earshell camera headsets from Showcomms provided last week.
On Site will be providing coverage of the Rugby World Cup in New Zealand next year, and are using the headsets in the Tri Nations in their build up for their RWC 2011 coverage. Duncan at Showcomms is a big Rugby Union fan and watched the match while eating his breakfast, and was very impressed by the quality coverage.
As well as selling these Peltors we recently hired comms to Omni OBs (NEP Cymru) for the England Rugby Tour of Australia and New Zealand.
More pictures below of the Eden Park match courtesy of Nick at On Site, thanks Nick.