Wirelessly posted (Blackberry Bold )
Honestly - seems like a gimmick and waste of money to me. The only people who might benefit are those who are deaf/blind, however there are Alertmaster pagers which are better.
Not to mention who wants to wear a box on their arm all day and have constant vibrations to deal with (distracting).
At home signalling systems provide all the visal feeback we need - for phones,doors, alarm clocks, smoke detectors, babies/general sounds etc.
I just don't see how this is helpful at all.