ptorrone noted a Make article about twittering your plants just in case you need that sort of thing in your life. And you do. He says "The gang from Botanicalls used one of Adafruit's new open source hardware ethernet shields for Arduino (open hardware too) to make some plants talk — and now you can too! That's right, having your houseplants Twitter you when they need water and more! You can see what one of the plants is doing now..."