Solar Powered Wireless Sensor Network — Chris is building wireless sensor networks using open source software and hardware that could be used in a variety of applications like air quality or home energy monitoring. It looks like he was inspired by Tweetawatt and is using xBee and ASUS wifi for communication in conjunction with Pachube for data display. (via MindKits)
Interesting Web Hacks (Quora) — You can quickly run HTML in the browser without creating a HTML file: Enter this in the address bar: data:text/html,<h1>Hello, world!<h1> (via Alex Gibson)