The Coral Content Distribution Network

I've used this service since they started and have had mixed results. MOST of the time it really does speed things up, but your use may very. I recommend you give it a go and see for yourself. I've tried it in multiple locations with different ISP's both private and open and really didn't notice a difference between the two. If it works for you great, if not, well - I tried. It is a great concept and if I were to guesstimate my performance increase I'd put it at 50/50. The sites it does work with is a total plus and a huge increase in speed. That's just my personal opinion.

Here's the link and info from the site:

http://www.coralcdn.org/

What is CoralCDN?

CoralCDN is a free and open content distribution network based around peer-to-peer technologies, comprised of a world-wide network of web proxies and nameservers. It allows a user to run a web site that offers high performance and meets huge demand, all for the price of a $50/month cable modem.

Publishing through CoralCDN is as simple as appending a short string to the hostname of objects' URLs; a peer-to-peer DNS layer transparently redirects browsers to participating caching proxies, which in turn cooperate to minimize load on the source web server. CoralCDN proxies automatically replicate content as a side effect of users accessing it, improving its availability. Using modern peer-to-peer indexing techniques, CoralCDN will efficiently find a cached object if it exists anywherein the network, requiring that it use the origin server only to initially fetch the object once.

One of CoralCDN's key goals is to avoid ever creating hot spots in its infrastructure. It achieves this through a novel indexing abstraction we introduce called a distributed sloppy hash table (DSHT), and it creates self-organizing clusters of nodes that fetch information from each other to avoid communicating with more distant or heavily-loaded servers.

CoralCDN has been continuously operated since March 2004, running on 300-400 servers on the PlanetLab testbed, spread worldwide. As of 2011, it receives 25-50 million requests per day from a few million unique clients.

(What's with the Google ads? Our Illuminati measurement project sought to understand how IP addresses and public information characterize Web clients. One related question is how such information plays a role in pay-per-click advertising, so we decided to run some ourselves to better understand how such systems work.)