I do have a 1'x1'x1' tank with nothing in it at the moment, but when my uni break starts in about 4 weeks, I will be doing a nano FOWLR. I've got a 5' running at the moment, so water change shouldn't be an issue for me. I plan on probably changing a cup of water per day?
I probably be using just a internal filter or something, because its one of those ones that has a closed top with the light inbuilt, so no way can I attach a protein skimmer to it. Unless ofcourse I do some DIYing to the tank. Hmm a interesting thought there.