Digital Quartz writes: "There's all manner of ways to get last-mile broadband access these days, from cable to DSL to microwave, but QuantumBeam, a Cambridge based company, wants you to surf by laser. Check out the article at The Wall Street Journal. I wonder how well it performs in the rain?" The promise of optical wireless is alluring, but it's also been said before ... I hope it actually pans out before it becomes old tech.