Here is the first version of a small an app that displays the signal strength of available wireless networks.

You can get it from here for now.

It is available in extras-devel: http://maemo.org/packages/view/wifieye/. Please understand that using software from extras-devel may harm your device in many ways.

It is available in extras-testing.

All comments are welcome.

EDIT: It requires python-wifi, python-qt4-core, python-qt4-gui
EDIT: This version only works when wlan interface is up (e.g. when connected to a WLAN). It will be fixed in the next version
EDIT: This version is slow to start.