I'm having the same issue. I'm powering my TinyDuino with the mini usb. The Bluetooth LE device boots and reports back -
### system_boot: { major: FF, minor: 5000, patch: 4953, build: 5220, ll_version: 4156, protocol_version: 1, hw: 10 }
BUT I can't get another other device to discover it. I've tried using my iPhone 5, MacBook Pro, and a Windows 7 PC. I read that with rev1 the device would not be discoverable if powering with mini usb. Does rev2 have this issue as well?
Thanks,
-chris