I don't know how many people read the news posts down at the bottom of the MS home page, but check out the report about natalizumab. It's another word for Tysabri.
As someone that has been out here shouting at the top of my lungs about what I've known about how beneficial Tysabri is, it is a cause for concern, if you ask me. If my MS was in any way affecting my everyday life, I would still take it without question. But I thought I'd point it out.