Fredrik Tolf wrote:

2. Since hubs will restrict the search frequency anyway, isn't up to
  the user if he wants to search for the same thing again the next
  time he can, instead of searching for something else?
 

Must this be the case?  I haven't understood why discarding searches (or discarding searches and warning the user) is a better approach than reordering of commands by the hub.  The cost is code complexity, but if you can delay searches, isn't that a more elegant solution?

- Todd