Ambrosia Software makes a neat little little utility for OS X called Wiretap, which allows you to record whatever sound is currently being produced by your sound card to a variety of audio formats. It was exactly what I needed for the task at hand (recording some snippets from an internet radio broadcast).
Another awesome OS X utility (quickly becoming indispensible for me) is Quicksilver, first recommended to me by Max. You leave it running in the background and then summon the interface with CTRL-<space> and start typing the name of the application you want to launch and hit enter (it usually only takes a couple strokes for it to figure out what you want). It automagically catalogs everything in the normal places where Applications live and has lots of other neat features which I have barely begun to explore