I have a 2007 model and am debating what to do with it when I settle in to my 2013. Before the iMacs I would just say 'reuse the monitor' but that is not an option since you can not do that with the 2007s (unless you create a virtual monitor over ethernet). Both myself and my spouse have computers so it is not like I can foist the problem off either. While recycling is a nice thing for Apple to do, reuse is much more energy efficient. Due to the iMac having a closed architecture some of the reuse possibilities are limited. For example, I can not put in a second ethernet board and just set it up as a firewall. So any ideas?