I think this last little crash may have raised the awareness of other exchanges; while Mt-Gox was offline the others were still going.  Maybe more people will move their business to other exchanges, taking the pressure off Mt-Gox and reducing its risk as a single point of failure.  I trade in GBP so Mt-Gox is my only choice at the moment.  Max Keiser is supposed to be consulting for a new (and professional) exchange based in London.  That should help a lot.