Netbook computers remind me of travel toothbrushes and portable air mattresses. You use them only when you need to move a lot, like when you’re on the road or camping or running around at a trade show. They’re just not nearly as functional or comfortable as the at-home version. But when you’re on the move and you need a real keyboard, a real Web browser and a full PC operating system, a netbook will save you no small amount of agony. I put a new HP Mini 1000 to the test while covering the Consumer Electronics Show this month.