Easy to understand doorhandles

Ok, doorhandles are not really all that hard to understand, but what if your doorhandle glowed green when it was unlocked and red when locked.  You might not want this all over your house, but imagine the business applications (think security and privacy).  This post on Thinking by Peter Davidson links through to a company called Brighthandle that sells these doorhandles.  There are both hard wired and battery powered models available and it doesn’t yet seem that they have distribution in the US.  No pricing details are available on the site.