Your article Doctors Use Caution with Tysabri includes information from a previous Reuter's PR (about a month ago) based on a very poorly constructed and narrow survey.
As for doctor's willingness to prescribe Tysabri, I suggest you contact Dr Ted Phillips who is director of the Multiple Sclerosis Center at Texas Neurology in Dallas.
I would also suggest that you start posting some of the wonderful stories related to patients who are currently taking Tysabri.