Even with a plug adapter, of course, you'll still have to worry about converting voltage. But every decent laptop power supply is rated at least 110-220 so that shouldn't be a problem in most parts of the world. If you're taking our advice and charging all your travel peripherals through USB, that should take care of most of your electronics.
Though speaking of voltage - and if you're looking for something a little more comprehensive than EUROCOM's page - Conrad McGregor has put together one of the most complete global electricity guides in existence. The World Standards page contains just about everything you could ever want to know about plugs, sockets, voltages, converters, etc. Did you know that in Brazil there's no standard voltage, that in Saudi Arabia they go up to 380 V, and that in Japan voltage is the same everywhere but the frequency differs from region to region? All true.
· Options for Minimizing All Your Travel Gadget Chargers [Jaunted]