JoeHewitt.com

  Firebug for iPhone

   "Basically, it is a little Python web server which acts as a
    bridge between your iPhone and the Firebug console running in the
    browser on your computer. When you call console.log() on the
    phone it sends your log message to the server, which reflects it
    back to Firefox (or Safari or whatever), which displays it in
    your nice big Firebug console. You can also enter JavaScript
    commands in the command line in Firefox and have them sent to the
    phone, evaluated, and sent back to Firefox. It all works
    surprisingly well"
 
 - JoeHewitt.com
   http://r1.sharedcopy.com/r96hc