Brompton copy? Sign me up!
Just curious what wheel size you envision for the bikes, and what rear dropout spacing you plan on. Are we talking 16" wheels? 20"? Standard hub sizes or weird Brompton hub sizes?
Also, if you need anyone in the PA area to beta test either the Brompton clones or the electric-assist, I'd be happy to.

(schmooze schmooze) The electric assist I'd probably turn back over to you at the end of it, but I'd likely buy the Brompton clone at the end of the test period.
Lastly: Any worries about violating Brompton's "copyrighted appearance", even if the patents have expired?