Watch you back, Big Oil! We spotted no fewer than two environmentally friendly energy systems out in the wild this week — one that runs on garbage, the other on oil from fast food — and each has the potential to be as revolutionary as this plan to combat global warming. The future's looking bright, at least for our robot overlords. In other news, Microsoft's Zune stole a little of the attention usually reserved for Apple, with our review of the Wi-Fi music player revealing its true nature and the week culminating in red-hot rumors of a Zune phone. Way to get creative, Microsoft. More top headlines of the week:

Saturday: Nike Hatphones keep you warm and rockin'
Sunday: Chaos robot is ready to tangle
Monday: Sonic Boom alarm clock obliterates your sleep
Tuesday: Helio launches mobile music service
Wednesday: Giant 'scaffold' will weave new cartilage from stem cells
Thursday: Ring faucet encourages water worship
Friday: iPod lock gives you peace of mind