It is currently not possible to create a beacon with bluz in Wiring, though this is definitely something we plan to support.
Yes, iBeacons are basically just broadcasters that send specific information. You would need an app to interpret that information to make them meaningful. There are other types of beacons, such as Eddystone, that provide more features (such as broadcasting URLs to enable the physical web). But at the end of the day, a beacon is just a broadcast device that requires some thing (almost always an app) to receive the data and interpret it.
We actually do have beacon firmware for the nrf51 that is programmable through the Particle cloud. However, it isn’t currently compatible with bluz, it is on our roadmap to integrate the two. If you are really interested, we could possibly get you that firmware in binary format to flash to your board, though you would need a JTAG/STLink programmer and I would call the whole thing highly experimental