Some comments:
1) Can't the beeper ringing be disabled on the configuration page by setting beeper to false?
Yep, set it to false and it still beeps randomly.
I got the Beeping sorted
Removed the casing 5 screws each side
speaker/beeper on the top
open it with a sharp blade and pulled out the round steel thingy

no more beeps
!!! The techie within me cries out in alarm... This is like removing the engine warning light to fix an engine problem!
If anyone wants to sort the beeping noise in a more appropriate way, I'd recommend the tape method. It will not stop the sound completely, but it will definitely deaden it. The intermittent beeps are purely a software issue, and will almost certainly be fixed in a future firmware release. I suspect its whatever is mixed in with CGMiner.
Seriously hoping that future firmware will improve CGMiner efficiency too, it bothers me seeing it load out the controller board as high as it does, and I reckon it would probably reduce reject rates too...