Recording Audio Streaming Podcast Software

I'm sorry if this has been asked, but I've scoured the net for stuff and just can't seem to find anything real useful.

This Thursday, there is going to be a conference call that will be broadcast through the net but I have to work and so I'm going to miss it.

Is there a software that I can use to record an audio broadcast from a regular website, that will NOT record additional audio from my iMac's microphone? I don't want my voice being recorded along with it.

Any help would be appreciated!! Thank you all.

This might get the job done Rogue Amoeba | Piezo: Charmingly Simple Recording From Applications and Audio Devices. I've used a program of there's called Audio Hijack Pro. pretty sure it would do this.

There may also be some free alternatives.

Slydude's suggestions are good ones. You can even schedule recordings in iCal.