There is something quite similar in the Sluggy Freelance webcomic (a cyborg who had to swallow brains to access all their memories), the Heroes series (Sylar...) and even a bit of Doctor Who (the Absorbaloff in the dreadful Love and Monster episode). Apparently some ideas come to a lot of people at once
And the downloading abilities thing is uncomfortably close to what our Collective friends like to do actually. Mmmh... there might be some ideas of evolution for the Borg here.
Which leads me by the way to another interesting idea to ponder : what would happen if the Darwins were to be assimilated by the Borg ? Would the Collective gain any benefit from them ?