Re:Range (Score 1)

What you would need to do is store the item's present location (i.e. which room in the house) in a database. When the item crosses an RFID boundary, update the item's location in the database. Each room (and perhaps window/doorway) can have sensors that when tripped notify a central system that an item's location has changed. This eliminates the need for a super-ranged transciever. Although, you would probably need two sensors at each boundary to make sure you know the item is either "entering" or "exiting" a region. Sounds expensive...and tedious...but kinda cool.