Just imagining the demi-fey done well in CGI terms makes me happy.
I was actually picturing them as actors in costumes with the same kind of special effects as the TV series 'The Borrowers'. But maybe CGI would work better.

I'm surprised there aren't little blood-sucking Tinkerbells on televion already.
I think they're all in the Hellboy 2 movie at the moment. (Which I haven't seen yet, but I saw a special about it.)