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How about some Stephen King? (And step up a directory for lots more yummy text).
Are you doing this in the name of keyboard design? I'd be inclined to ignore spaces - not that they're hurting anything - since, unless you do something very radical, the space is still going to be operated by the thumbs and so quite independent of the fingers.
But paying attention to punctuation could be useful. I've thought you could make some important improvements by moving some punctuation to the center of the keyboard, with a second sort of shift key to access it.
I hope it's a fun exercise, because it's not hard to type faster than virtually anyone needs to on a standard qwerty.