I agree with many that have already been listed....TAF, TSPP, IJ, LOTR.
Also, here's a really obscure one that they did a very good job of integrating things on: Verne's World. The 4 playfield toys (volcano, octopus, hot air balloon, and submarine) are prominent features in Verne's novels. The playfield and translite also have a lot of really cool images from his works. It's too bad that the voicecalls aren't really that great, but the music really draws you in!