I think there is no difference between v1.1.0 of the firmware and a downgraded version of the v2.0.0 firmware. They are most identical.
Even the baud rate change characteristic is there.
The iBeacon Firmware is not yet ported to the BLE Shield v1.0.0 and even providing both functionalities at the same time is not available on the BLE Shield v2.0.0.
Porting the iBeacon firmware to the v1.0.0 shield would be doable as well.
Melting both functionalities together into one firmware sound good and doable as well.
I'll work on this for both Shields now