Instructables needs an "I Made One" button
When you make something that someone posted a project of, you have no way of telling the author and the 'ibles community that you made one other than posting a picture in the comments. Those of you familiar with Thingiverse know that one of the most popular features is the "I Made One" button. On a "thing" you just press that button and you can post a picture of the one you made. Everyone's derivatives of this "thing" shows up on that thing's page as well as on a running stream of derivatives.
I think that if this feature were to be implemented in Instructables then it would increase community participation by a lot. Authors could see who was making their stuff, who was succeeding, and who was failing. And also everyone would be able to see all the different ways of making it that are creative and different.
This would also give yet another reason to become a member because then people who are just making things and not posting things would have something to do with an account.
This could even be folded into the Pro membership by giving Pro members higher billing on the list of people who have made it.
All in all I think this would be a really great thing for Instructables to have. The stream of made things on Thingiverse is located here: http://www.thingiverse.com/made-things . And here is an example thing that a lot of people have made: http://www.thingiverse.com/thing:1046 (its under Other People's Copies)