A couple weeks ago I bought Sony's ebook reader and I'm completely in love with it. This is the first full book I read on it. Actually finished this at least a week ago, but I completely forgot to write an entry for it.
So! This is the first in a 6 part series of Next Gen books that bridge Generations and First Contact. At the moment they're only available as ebooks, but the SCE ones are released as paperbacks so I'm assuming these will be eventually as well. This one is by Steven and Christina York.
There's a changeling infiltrator and there's interesting stuff with Data and his emotion chip (which is a new thing for him at the time this is set)