I apologize for the shameless plug of my thesis work but it just so happens to deal with the hacking of everyday objects.
http://modifyformisuse.posterous.com/
The site is a platform for discussion and discovery about the modified objects I have created. They have been modified according to observations of misuse, reuse, unintended use, purposeful appropriation and thoughtless acts. The motivator for seeking unintended uses are convenience, necessity & play. These objects were altered in order to facilitate specific unintended and unexpected uses and are not meant to be commercially viable products. Instead, they are tools to help start discussions and offer new ways of seeing the hidden potential in our everyday objects.
Please check it out and feel free to leave comments on the site and guess what you think they have been modified to do.
Thanks!