No worries Kris - For me the 28-70 was a great range. Sometimes I'd have liked a little more zoom and sometimes a little more width without the need to change lenses, but it did fantastically well overall. Of course being f2.8 was a big factor in it's use too since I gave preference to it when the light was bad (eg Milford Sound).
FWIW Here's our rough itinerary:
Day 1 - 8 February 2007: Wellington
Day 2 - 9 February 2007: Paraparaumu, Waikanae, Otaki, Levin, Shannon, Palmerston North
Day 3 - 10 February 2007:Note: Speedway In Palmerston North
Day 4 - 11 February 2007: Bulls, Wanganui, Hawera, Eltham, Stratford, Taumarunui, National Park
Day 5 - 12 February 2007: Taupo, Rotorua
Days 6 & 7 - 13 & 14 February 2007: Lake Rotorua
Day 8 - 15 February 2007: Taupo
Day 9 - 16 February 2007: Napier, Hastings, Havelock North, Waipawa, Waipukurau, Dannevirke, Woodville, Palmerston North
Days 10 & 11 - 17 & 18 February 2007: Palmerston North
Day 12 - 19 February 2007: Pahiatua, Eketahuna, Masterton, Carterton, Featherston, Martinborough, Lower Hutt, Wellington
Day 13 - 20 February 2007: Wellington then ferry to South Island, Picton, Blenheim, Westport, Punakaiki
Day 14 - 21 February 2007: Greymouth, Hokitika, Franz Josef
Day 15 - 22 February 2007: Franz Josef & Fox Glaciers, Lake Matheson
Day 16 - 23 February 2007: Haast, Wanaka, Queenstown
Day 17 - 24 February 2007: Shotover Jet boat ride, Te Anau
Day 18 - 25 February 2007: Te Anau to Milford Sound & return coach + ferry
Day 19 - 26 February 2007: Cromwell, Omarama, Twizel, Mt Cook Village, Lake Tekapo
Day 20 - 27 February 2007: Ashburton, Christchurch
Day 21 - 28 February 2007: Christchurch
And for those contemplating an NZ trip the Travel Planner function at the
NZ tourism site is fantastic - I used it to prepare the entire final itinerary once Leon had worked the first draft out and it worked out things like driving distances and times.