For sure, the best coffee shop laptop on the market. A portable is meant to be portable right? And its a Mac!... I have a Mac Mini desktop at home, and this minimalists machine is intended for travel anywhere. Here is some more advice from what I have found so far:
1) I only use the bare amount of apps, and ones that are efficient (i.e. iWork suite, no Office, and limit Java apps which tend to use up CPU). I evaluate any new software I purchase and watch it perform in activity monitor. If it is a CPU or memory hog, I find another product. So far, the apps that look more Leopard-like seem to be efficient (I guess based on cocoa?).
2) I have a small bootcamp partition setup (14 GB on a SSD 1.8 Ghz) for Windows XP. I boot into it when I need my business apps for work (Office suite, plus windows Skype version so I can still make calls when I reluctantly need to run windoze.). I also run it with Parallels in some cases, but the fans will spin up.
3) I have two changers... one at the office, and one at home. In between, I now usually go all battery for the coffee shops. Keep it simple, light and only one thing to worry about without the wires/brick... unless of course I plan to work for a long period of time or run more demanding apps which drain the battery, then I carry a charger.