Hawaii -- coming on vacation, renting a house?

Hi, we are coming to Hawaii next year -- right after christmas so like december 08 - january 09.. its either going to be honolulu or maui.. it depends on which PGA tournament my uncle (on the tour) gets us tickets too. We have come in the past and stayed in resorts but there is going to be more of us this year and my dad wants to just start searching around and getting prices for renting homes for a week or two. Anyone know of any sites online where we can look? Prefer not Resort Quest. Thanks :)