Sarge, thanks for the advice.
I hope Steven consider to enhance MB functionality by adding the tool for cutting audio files. I can imagine the intuitive audio cutter build in MB that would take advantage of existing MB features (see above) and wouldn't clutter the GUI.
Furthermore, the small size of free separate tools that provide the audio cutting functionality (mp3directCut, Wavosaur) seems to point out that the MB installer wouldn't increase too much when the cutting tool was added.