Nice idea, but unusable in reality:
1) There is no indication whatsoever if the program has been triggered (e.g. accidentally). It will then record until it has drained the battery in a surprisingly short time.
2) It drains your battery. This was the first time ever that I heard the power alarm sound of my N900.
3) The icon is so small that it is impossible to drag it around without the stylus. Since it is only marginally larger than its close button, dragging usually removes the whole widget.

Good app, can be used to record phone and in person conversations. Also useful for taking verbal notes, classes/speaches etc.
While the icon does change color a bit when recording now (more like it changes lightness), it would be nice if it was a little more obvious. Some ideas : pulsating icon, the universal 'stop' icon, completely different color (ie green).