Does anyone know if there is such an app for the Wifi enabled BBs?

(I hope this is the correct category. I wasn't sure if I should ask here or under Wifi)

it's a long way to get to it. Start on the main screen and open the Manage Connections app.
Scroll down to Wi-Fi options and click.
Click on the Blabkberry Key (the one with the little dots on it) and scroll down to and select Wi-Fi Diagnostics
Click on the Blackberry Key and select Site Survey.
You are there.

@amcast Thank you very much. I had no idea it was built in.