There are alot of places where people talk about putting everything on the SSD. Not wow necessarily, but OS and games etc.

And while they get better performance in general, its because of better read performance. Many drives suffer from a stutter on writing. Just read any number of newegg reviews on the drives.

You will definitely benefit from an SSD - most have found symlinking the MPQs (or more precisely their folder)to be very helpful. IF you want to run the whole shebang on the SSD then do it and let us know how it goes. But the general consensus on SSDs is they are worth the money in applications where there is heavy reading and that you will want to stick with HDs in heavy writing apps.

Google is your friend :) (when can I get an implant that gives my brain direct acces to google?)