Hi - I am currently using a G4/1.5ghz Mini as my primary computer, and I have been waiting for the right time to get a new Apple desktop. I've been a little frustrated waiting for a Mini refresh. The iMac doesn't quite work for me. I am starting to consider the Macbook as an alternative. The Macbook and Mini are fairly similar in terms of processing and graphics power. That is not completely true, but it is close enough. The Mini is more or less a laptop in a custom desktop case. For reasons known only to Steve, the Mini seems to use components that are one refresh behind the Macbook. My question to Macbook owners is whether I would regret buying a lappy when I will use it at a desk, attached to an external monitor, KB and mouse most of the time? Will I hose the battery life? Should I be concerned about cooling if it is turned on but in sleep mode 24/7? I know I will grow to love the portability, and I already have wireless G all over the house (but Gig-E at my desk...) so that is a huge bonus. Huger than huge! Thanks in advance!