I recently bought an acer aspire one, and have had mine for four weeks now, and it has been really difficult to put down and walk away from. Clearly the weight and size of the thing is a big reason, and also because the 6 cell power-supply lasts so long that I feel like I can just leave powered up for ages without feeling the need to keep switching it off or charging it all the time. Also, boot time and switch off times are a lot speedier than my regular laptop.
I’m loving my new Acer Aspire One, and am continually amazed at what it can do.