If you search Emule/Edonkey for 'Streambox vcr' you should 
find a 'suite' that will help you get rtsp and pnm 
streams.  It's a slightly modified/embellished version of 
the last beta version that Streambox produced.  It was a 
beta version so I should remind everyone that some features 
don't work quite right and it crashes sometimes and can't 
get some streams without a lot of work (or at all).  But it 
is much much better than nothing.

On the ASF side, there was ASFRecorder and some updates 
called ASFR+

Lastly, there was a URL sniffer program called URL Snooper 
that made finding the urls to media streams a lot easier, 
especially if the stream urls were buried in complex 
javascript on javascript protected pages.  It's also on 
Emule.

I recommend the 'pawcio' mods of emule at the links below 
because of their better bandwidth management features.
Links:
<http://www.emule-project.net>
<http://www.emule-mods.de/?cat=pawcio>
<http://www.kademlia-mods.de/?mods=pawcio>