No, our bionics can't find Chromecast, either. I've set up Chromecast successfully on the TV, and used it from our laptop and both our tablets, but neither of our bionic phones can see it. Since we both have screen locks, I thought that might be related, but once I (finally) figured out how to remove the screen lock and try again, it still didn't work. I've previously removed AVG and uninstalled a couple programs I thought might be preventing it, but no luck. Interesting about my Xoom tablet: it found the chromecast when I accidentally had WiFi off (3G found it)! Tried that option on the bionics but that option is overridden by the version of Chromecast on the phones.
I'm stumped.