Do your friends complain that you can’t pull your eyes away from your iPhone? Well, if you get the new XWave by PLX Devices, then you might have trouble pulling your brain away, too. The peripheral, released in November for $99, brings an EEG-based brain-computer interface (BCI) to iPhone, iPod touch, and iPad users at an affordable price. Based on NeuroSky’s Mindset, XWave gives you the power to manipulate various apps with brain rhythms. While you can’t text or browse the web with it yet, the XWave represents an important step in bringing BCI to the masses. Also, with the falling cost and increasing spatial resolution of brain-imaging technology, it’s exciting to ponder what powerful BCI devices we’ll be able to get for $99 in the future.