Using my iPad to do research is one of my favorite uses.
It is so portable I can grab and go find a comfortable spot to sit while I find solutions to a few problems.
The other benefit of using my iPad for this sort of thing is this allows me to keep tasks separated. When I am at my computer I write code. When I am using my iPad I am doing research and communication.
This sort of separation works for me. I like to focus on one skill at a time.
When doing my research I also usually grab my notebook for notes that are not needed on a screen and headphones for listening to a podcast.
Do you separate out your tasks to different devices?