We went and had dinner at the 101 food court - Lonely Planet called this the best that they'd ever seen. Here's a nighttime picture taken on the way back to our hotel.
The food court is located in the lower basement level of the mall, which shares a foundation with the main tower. There are probably hundreds of restaurants and shops down there serving all varieties of food, from authentic asian to middle eastern to US fast food. We wandered around a bit and ended up going with a Hong Kong specialty - "A Kuan" milk noodles. The broth is made with real milk - a bonus for those of us that are lactose intolerant - and while highly surreal, is also very tasty.