https://www.thetileapp.com 

My TILE devices have just arrived, after I preordered in August 2013.  In the first 5 minutes I'm pretty happy.  Easy to set up, load the app, press add button in the app, press button on (squeeze) the tile, and give the tile a name in the app.  I walked out of the office and about 30 steps to the street.  The app was able to have the Tile made a noise at that distance and gave an approximate distance to the tile.  If I had more time I could have played a game of Marco Polo with my keyring.

The tile itself is a little bigger than I had expected, so I won't be able to stick one to my TiVo 'peanut' remote control as was first intended.  Sticking one to a remote control with a flat bottom would be simple and work well.

I'll have more of a play and post later in the week.