I have an OCZ Vertex 2 60g. Other than this, it seems to work great. Definitely super fast.

So I'm now running from 5 separate, complete wow folders and so far no crash. I have noticed them doing their "update" independently of each other. I bet I've got 5 clients trying to write to the same file. But seems like other would have the same problem, or they're doing something I'm not. Anyway, I think it needs some more testing.