Being a serial killer of house plants doesn't involve elaborate plots or a high I.Q., but it still seems to be a favorite (albeit unintentional) pastime for many geeks. Now a Twitter-enabled solution exists that may help save the lives of millions of innocent plants.
The Botanicall is a kit that allows you to give your plant the power to tweet or send you a text message on your phone when it is in need of watering. The device uses an Arduino microcontroller, an Ethernet module and two probes that you insert into the soil to monitor moisture level. The unassembled kit costs $99.95 here.