Surprisingly, I haven't seen a single thread on this topic, whereas it has been around for quite some time with MBPs. Lets say I wanted to use a MB in desktop mode, with a wireless mouse, keyboard, and external monitor. With the lid closed, and the external monitor as the only screen (main screen), will the MB heat up? Oh also this came to mind. I know it might have been an issue in early Leopard stages, but there were glitches where doing this desktop mode will cause the notebook screen to go dark and you have to reboot if you want to use the notebook's screen instead or with the desktop screen. Does this happen with the MBs now? Thanks for the help everyone.