There were five or so sites on the SCI Web Ring, three being mine, hehe. When Yahoo bought them or something, they kept making a load of changes and making you reregister as a yahoo member and all sorts of stuff. I went through all the hoops, but there were still some problems. There honestly aren't enough dedicated SCI sites for one.
Maybe when SCI Studio 2.0 Final is out and open sourced (major hint hint) things will pick up (fingers crossed).