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I love a few of these concepts Reyn Vlietstra has dropped on the Ruby-Talk list for an object-oriented shell. Gleaned from discussion on the R:O:S mailing list:

• methods added to filetypes
  • >> somesong.mp3.play
  • >> some.jpg.rotate(90).view
  • >> somefile.extension.defaultopen("/usr/bin/somebinary")
  • >> somefile.extension [which would open it using somebinary]
• custom global objects
  • >> db.somedatabase.sometable.find_all [active_record could be used here]
  • >> apache.config.port = 81 [Not sure how this would work ? read/write the .conf file ?]
  • >> apache.restart
  • >> samba.config.global.security = user
• chaining of commands
  • [grep something] | invoke a graphing application which will show the number of ocurrances by filename with a bar chart
  • gimp.applyfilter(gimp.filters.blur) | email.send("blured image","someone@somewhere.com")
• opengl for the command line:
  • The cli then becomes more of an ide, a combo box could be popped up for command suggestions instead of the usual list of commands which saves space.
  • images could be displayed on the cli iteself
  • a nice graph of the chained commands could be displayed with each command’s projected inputs and outputs for the current fsm [Could be generated by doxygen]

A very sturdy list. I think you’d run into the same problem that Yubnub’s found with pipes. Especially in the case of a gimp-to-email pipe, how does the email know how to translate the incoming string? I imagine metadata will need to accompany strings which are piped. (Ripped from ruby-talk:152684.)