I had a solution, that worked for a touch-typist. A small device, with a decent keyboard. I'd enter notes while discussing things in the meeting - basically I typed away everything that I thought needed recording, didn't make any attempt at organisation. That could be done later. Keyboard was rigid, so it would work on my lap if I didn't have a table in front of me.
Worked brilliantly, battery life was over a week.
That was a palm pilot with a belkin keyboard.
Not seen a tablet solution as good as that on the market. They are nearly getting there.