I just found out about a great new company: Verdant Computing. They're dedicated to the idea that we should make our technology choices as environmentally-friendly as possible.
The basic principles that Verdant follows are:
made with recycled or sustainable materials
easy to recycle
fewer toxic materials
The site is also informative beyond the company's own offerings, seeking to educate would-be-consumers with a variety of articles and links. The founders claim they won't try to over-sell, because excessive consumerism is "bad for you, and bad for the environment."