Great concept... just needs some generalization + refinements...
Here's my offering... brainstorming... I'd love to beta test any prototypes!!! (I'd rather write specs and do the testing, rather than the coding... )

Shareaza is already doing this, please see:

http://www.gnutellaforums.com/showth...224#post133224

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Geo here... <small>antique computer enthusiast
Mac Powerbook G3/500MHz=<i>Pismo</i> :: 384MB ram; 80GB hdd; <b>MacOS 9.2.2</b>
Compaq Presario 5360 :: 450MHz AMD Athlon, 192MB ram; 120GB hdd; <b>Win2k PRO SP4</b>
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PtoP :: LimeWire 4.8.1 <b>PRO</b> || Shareaza 2.1 <i>for BitTorrents, mostly</i> || but not concurrently! <i>
This is an INTEL-free, pre-Y2K CPU, recycled-computer environment! </i>