Code examples: http://www.cs.tufts.edu/~nr/c--/download/c--exn.pdf
Slides: http://www.cs.tufts.edu/~nr/c--/download/c--exnslides.ps.gz
Audio: http://wino.eecs.harvard.edu:8080/ramgen/nr-pldi00.rm
The Manual: http://www.cs.tufts.edu/~nr/c--/extern/man2.pdf
The manual contains the specifications and a few code examples. It looks like it's easy to learn, but it's a little different than other languages.