cellurl writes "I run wikispeedia, a database of speed limit signs. People approach us to Mirror our data, but I am quite certain it will become a one-way street. So my question is: How can I give consumers peace of mind in using our data and not give up the ship? We want to be the clearing house for this information, at the same time following our charter of providing Safety. Some thoughts that come to mind are creating a "Service Level Agreement" which they will no doubt reject, or Mysql-clustering or rsync. Any thoughts, technically, logistically, legally appreciated."