The Martinborough Hotel
Right in the centre of town and has plenty of rooms.
Margrain is just down the road from Poppies and has a few different accomodation options (and some delicious wine).
Martinborough Top 10 Holiday park
Varied accomodation with apartments/cabins as well as camping/RV spots.
The Claremont Motel
Motel style accomodation with loads of different room options available.