I can't bring myself to give up my old Mac.

I just replaced my old Late 2008 Macbook unibody with a shiny new 128GB MacBook Air 11" and I can't bring myself to sell my old computer. I don't really need it anymore, and my new computer has become my daily driver. I could sell it...but I feel like I'm really attached to it. Never been that way with a computer/gadget before. Anyone else like this with their Macs?