Montague has an interesting folder at the intersection of several of these points, the Boston ZE:

Montague Electric Bikes - Boston ZE

I'd be more interested in it if it didn't have the cell phone integration, which is why I'm planning on a Geoorbital wheel for my Montague Swissbike X50 (which I have almost finished kitting out).

I'd really like to see a design like to the Helix (or the Helix when it begins shipping) which had 26" wheels and an electric option.