I use my macbook on my lap all the time. In bed, in front of the tv, all the time. I have a lap tray that I use. It's a plastic tray with a beanbag bottom, not sure where I got it though, it's a few years old. I also used smcfan, but I decided to uninstall it. I figured that the apple factory settings for my fan are what apple finds is best, so who am I to second guess them, good progam though, easy to use. I also use the macbook on my lap with no lapdesk. It does get warm though. Hot? not really, but kinda warm. I know they say you shouldn't use it on your lap, but isn't that what a notebook is for? People say don't do it, but I don't care, I like sitting on the couch in front of the tv with it on my lap. There are bigger issues in life then worrying about a notebook on my lap. Apple fans are out the rear of the macbook, not the bottom like most windows machines, so no fan ports to block. As far as a cooler, I don't find that it gets hot enough for a cooler. When on my lap(we all do it, I just admit it), the fans aren't on a whole lot more than when on a table. There are some usb powered coolers out there, my wife has one for her windows machine. It works well enough, Targus made it.