Need one of these -- bad ass dragon gate -- once we get our earthship built: https://plus.google.com/u/0/+CustomMade/posts/23CU5mzSupM

Hemcrete

Green concrete made of hemp!

Moss Instead of Grass

http://www.sweetbrick.com/green/why-moss-is-greener-than-grass-replace-your-lawn-with-moss/

Many Simple Ideas

http://www.dumpaday.com/index.php/2011/05/simple-ideas-that-are-borderline-genius-part-8/

Lots of ideas that make sense.

FLOW Table

http://www.fastcompany.com/blog/cliff-kuang/design-innovation/table-thatt-turns-your-kitchen-mini-ecosystem

Make your kitchen an ecosystem!

Transparent drain

I could use one of these on every drain in the house.

http://www.good.is/post/Superb-Idea-A-Transparent-Drain/

Light with water bottles

http://www.treehugger.com/files/2011/03/diy-skylights-from-used-water-bottles-replace-50-watt-bulbs.php

Electric Stove Top

http://www.youtube.com/watch?v=2wBe3SDCcz8

Very cool electric stove top.

Solar Toothbrush

http://greenopolis.com/goblog/litegreen/solar-toothbrush-no-water-or-toothpaste-required

Just another way to cut down on water use.

Light-Transmitting Concrete

http://www.cement.org/decorative/translucent.asp

Definitely an idea for interior walls.

Save Water Bricks

http://dornob.com/old-red-goes-green-recycled-wall-brick-built-to-save-water/

Off the top of my head, I'm not sure what I'd use these for. But they're cool, and I'm sure I can think of something.

Pattern Light Fixtures

http://dornob.com/pattern-light-fixture-designs-cast-stunning-wall-shadows/

They're pretty!

Fiber optic lighting

While it will probably not be an issue with a typical earthship, it's possible to have natural light with fiber optic cables.

Recapturing heat from draining water

I stumbled on a site ages ago that I apparently forgot to include on this blog, but I recently found a couple of sites related to it.

Graywater Heat Recovery and REI both have products that recapture the heat from warm water that goes down the drain, transferring that heat to water coming out of the faucet. All told, this technology allows a homeowner to significantly reduce the amount of energy it takes to heat water.

The original site I found is EcoDrain.

Somewhat related: I'd love to have temperature-controlled faucet lights. Why? Funsies!

Horizontal Wind Turbines

http://cleantechnica.com/2009/10/23/the-new-nimby-defeating-wind-turbine/

These turbines mount along the upper edge of a roof rather than requiring a separate structure. Ingenious!

http://www.geekologie.com/2008/08/zero_carbon_footprint_the_sola.php

A solar-powered ice maker. Hopefully this will see some sort of commercialization so that it can be used as a zero-carbon freezer someday.

Recycling air

http://www.ctngreen.com/news/2009/03/ted-growing-air-recycle-indoor-air-100-with-just-3-plants/

There are many plants that I want to grow once I have my earthship, but this article explains that there are three in particular that can be used to maintain clean, healthy air: areca palm (four shoulder-height plants per person) for the living room, since it converts carbon dioxide to oxygen during the day; mother-in-law's tongue (six to eight waist-height plants per person) for the bedroom, since it converts carbon dioxide to oxygen during the night; and the money tree, which strips formaldehyde and other chemicals from the air.

A bed

http://www.floatingbed.com/

While it's certainly not essential to an earthship build, having these in the bedrooms would be absolutely phenomenal, and I think the beds fit an earthship thematically as well.

Outdoor furniture

http://www.inhabitat.com/2006/05/28/grow-your-own-grass-furniture/

In an earthship, I kinda wonder whether this would be feasible indoors as well. How awesome would it be if it was? VERY.

Building your own furniture

This site has free woodworking plans. Definitely would be cool to populate my earthship with home-built furniture.