Audio Hijack Pro 2.9.12
Rogue Amoeba has released Audio Hijack Pro 2.9.12, a fairly significant update to the audio recording program. According to the release notes, the new version no longer requires relaunching Safari in 32-bit mode to capture audio as long as Instant On is installed, can capture audio from Google Chrome and Firefox with no additional setup, and can record to the WAV audio format. A number of minor bugs have also been fixed, and preliminary support for Mac OS X 10.7 Lion has been added; currently the app requires Mac OS X 10.6.0 or later. ($32 new, free update, 6.2 MB)
Here's hoping this upgrade works w/ OS 10.6.7.
There's no reason to think it shouldn't, given that 10.6.7 is the most common version of the OS out there right now. (And it does here.)