Audio recording and editing software can be quite expensive, or, on the other hand, free audio editing software usually sucks. Audacity apparently solves both issues, being a quite cool audio editor, and many people seem to like it. One of the best advantages is that it is not only for Windows, but has Mac and Linux/Unix versions as well.
For more information about this free-which-doesn't-suck software (or just out of curio-city), pay a visit to their home web site: audacity.sourceforge.net
Now, all we need is a decent free video editor...