I know there are a lot of people who have stated their indecision or concerns about microchipping your pets so I thought you might want to take a look at this thread:
http://www.yorkietalk.com/forums/showthread.php?t=65677
If Gidget hadn't been microchipped she may have never returned home. Some of you have said no one would bother to return a Yorkie but this thread proves there are still good people out there.
jenefor...I'm thrilled for you and your family...I'm glad Gidget was returned and that she's o.k.!