Debian 5.0: Capturing audio from a web page?

[Randy Kramer <rhkramer@gmail.com>]

I'm (still) using Debian 5.0 (Lenny, iirc).  

I want to capture some audio from a web page.

Is there an application typically installed in Debian 5.0 that will help me do 
that.  (krec does not seem to work--maybe Debian is using ALSA rather than 
aRts?)

OTOH, I started to try to use ffmpeg, but the instructions I was following say 
I need a version of ffmpeg compiled with ALSA support, and the version of 
ffmpeg that is installed does not have ALSA support.

Can somebody point me in the right (simple) direction?

Even answering (or telling me how to answer) some simple questions, like:
   * is my system using aRts or ALSA?
   * is my system using gstreamer or pulseaudio?
   * is there a precompiled (binary) version of ffmpeg for Debian 5.0 with 
ALSA support compiled in?
   * ???

Thanks!
Randy Kramer