Oops, forgot to post this pic. This is the first image I found of the illuminated pots - from the same company I think? Edited to add: they're from Certified Lighting.
http://certified-lighting.com/...
Illuminated spheres!
So....these aren't planters but they're still cool AND cheap! Here's the DIY instructions with lots more images of the "glowing orbs" in the garden.
http://www.theartofdoingstuff....
I apologize for the scatterbrained, no rhyme--no reason, posting - I'm just grabbing the photos at random.
Here's a couple of ideas for birdhouses - this one is REALLY clever! An old teapot!
From a UK site, Eden Project
http://www.edenproject.com/sho...
This one is "green" - a green roof! Tutorial here:
http://gardentherapy.ca/green-...