As a final big purchase before the baby's arrival the Hubs and I decided to invest in a little MacBook Air (best decision ever!).
It's so light and portable I have it with me all over the house and as soon as I'm more mobile I'll be able to blog/email/facebook on the run.
Now that we have little Ethan I can play him little lullaby-es while I reply to emails and catch up on my blog reading.
If you're looking for something portable but don't want to go to the land of the tablet get a MacBook Air!