I have my 2011 MBP sitting on my desk, with my wired ethernet connection going into it. From my MBP I share the connection, so my iPad / iPhone can browse the web wirelessly etc. I like reading online texts from bed on my iPad, and for now, I have been turning the brightness right down on my screen and just letting it sit there (so the wireless signal remains active). So far, it's worked good, but I'm just wondering if I could be doing any potential harm by leaving it on all night, or if there's a better method? I.E. putting it in a state that is less power hungry than just turning off the screen, but still allows it to broadcast the wireless signal? I've heard of caffeine, insomniaX etc - Would these be better? Talk about first world problems.... Thanks.