My new 15 inch MBP should be in later today (woot woot!) and I am wondering what to do about my elderly 2006 MBP. It has been a great laptop for me, and is still kicking after all these years, but its age is showing. I thought about selling it on Ebay, but the laptop is pretty beat up (missing the function key, scratches, dented case, a weak hinge connecting the screen to the body and a dead pixel) and I probably won't get enough money to make it worth selling it. What should I do with it? Load up Ubuntu and have a zippy Linux Machine? Put Lion on it and have a through around Mac around the house? Format the HD and make it a Lion/Linux machine or even a Lion/Linux/Windows machine? What do you guys do when you laptops have been replaced but still have life left in them?