My friend Dylan just introduced me to the work of Japanese photographer and aquarist Takashi Amano. From his Wikipedia entry:

Takashi Amano is one of the most influential people in the freshwater aquascaping community. He can largely be credited with introducing Japanese gardening concepts such as Wabi-sabi and Zen rock arrangement to the aquascaping hobby. His tank compositions involve intricate, and typically asymmetrical (though balanced) arrangements of aquatic plants often augmented by river rocks and driftwood. His aquascapes are notable in that they often mimic nature in their appearance, and can be regarded as a form of art.

Besides his personal site, linked above, Mr. Amano also runs Aqua Design Amano, which specializes in high-end aquascaping equipment and supplies.