One of my all time favorite meals. Here's what I use:
Brine
2 quarts water
2 cups soy sauce
1 tablespoon vegetable oil
6 garlic cloves, minced
1 tablespoon grated fresh ginger
2 whole chickens, quartered (I often use bone-in thighs or leg quarters alone.)
Let this sit for 4+ hours, overnight is fine too.
Glaze
2 cups pineapple juice
1⁄4 cup packed dark brown sugar
1⁄4 cup soy sauce
1⁄4 cup tomato ketchup
1⁄4 cup rice wine vinegar
4 garlic cloves, minced
2 tablespoons grated fresh ginger
2 teaspoons asian chili-garlic sauce (I pump it up a bit more - the combo of pineapple and chili sauce is so good.)
I usually double the glaze and use it on other things - great on rice, veggies. Don't glaze the chicken too soon - the last five mins is fine. Do a search here on Huli Huli for lots more inspiration.