[mikey]

An iPhone would be far cheaper than a laptop and give you a similar capability -- granted, the iPhone version isn't the full feature set, but gives you both data entry and review possibilities.

I have the iPhone app generally open throughout the day, but dislike trying to use it for data capture -- so I also have an email open that I just append new items to as they come up, and email it to the Omnifocus email-in processor at the end of the day. I don't get to see those items integrated into the overall view until I sync up from the Mac in the evening, but generally I'm only adding 3-6 items a day, so that's not too big a limitation for me.