> that explains it. The kind of application i am
> thinking requires the facility for a user to search
> for a resource (CPU time) and where (IP location) is
> it available for use, so that it can request it
> back.
Sounds like GNU Net might be interesting to you.
http://www.ovmj.org/GNUnet/

> I have one more question on the reliability of
> freenet that I can assume. It may not be possible
> with current spread of freenet, but if the user base
> of freenet increases can one assume that certain
> file will be available from freenet at anytime? are
> any replication strategies being developed to make
> this possible? If not, are there any other
> implemented P2P file systems that anybody knows of,
> consider the availability issue.
Publius does trys to do this.  A publishing server
puts out data with a demanded lifetime.  It then pays
the system with an equal space*time integral
(Byte*Seconds).  It doesn't really lend itself to
filesharing but some of their annonymity goals are
better or equal to freenets.

Freenet is more haphazardly.  Theoretically if a file
is "popular" it will remain in the system because it
will get cached more, even if nobody is inserting it.

It is a "hard" problem to make a network that really
makes sure that users can't chump the system.  Here's
a paper I'm reading about it right now: 
"KARMA : A Secure Economic Framework for
Peer-to-Peer Resource Sharing"
http://citeseer.nj.nec.com/582637.html

I think the general mindset here is that's "hard" and
as long as the majority of resources belong to the
good guys, we'll not have to do anything like this.

You might also be interested in the "money" discussion
thread going on right now.  Mojo Nation was an attempt
to do capitalist economics based resource sharing. 
Though as someone mentioned there are tons of
problems:
http://hawk.freenetproject.org:8080/pipermail/devl/2003-August/008131.html


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