I stumbled across the following web site, and read one of the webcast transcripts. I like the format, in that the host questions experts (ie neurologists). I read the one on ON, even though I have never had ON (that I have known about), and I am now interested in getting an OCT performed.
There is a lot of information on this web site. Including videos, a dictionary, news
and more. The transcript on ON also starts by reviewing the recent PML cases in Tysabri treated patients.