Seconded - it's great fun.

I find that I need to be absorbing the text one or two sentences ahead of the words I am speaking, so as to plan the emphasis and timing.

Once I am familiar with the text, though, I can have a completely unrelated train of thought going whilst reading.

When reading aloud to kids you must read with a passion and not only read the words 'as is' (or the kids will probably hit you with something). I don't know if it helps me with my reading/writing but it probably help the kids with their reading skills.