The current (August) issue of the UK's Dogs Today magazine has an article by the well known vet Dr Bruce Fogle on syringomyelia in the breed (he wrote the Dorling Kindersley Dog Encyclopedia amongst other things and his son was the BBC presenter at Crufts this year).

There's also an interview with Sandy Smith about the book she wrote on her experience of SM and her lovely cavalier Ollie -- this book, For the Love of Ollie, is in its second printing and has raised $4,000 Canadian dollars for SM research. More info here on the book and how to obtain it:

This copy of Dogs Today can be ordered over the web and sent anywhere in the world: