What ever happened to CIDF?

Was it SANS 98 that I saw some slides on this? I suppose CIDF was another one of those U.S. Government-sponsored research projects (the kind that small companies salivate over and big contractors squander) that went nowhere, produced nothing tangible? There better have been a real implementation that inspired CISL and not the reverse? Oh, yeah and while you are at it, please tell me the point of RFC 4766?