I'm looking forward to the USA debut of the Dahon Curl D9 (external derailleur gear, with single-sided front fork, and discs); The i3 has been on the market at least a year. Price on the D9 is unknown. I'm hoping on the D9, they use a Capreo or similar freehub that can accommodate a 9 tooth high cog, a big plus for 16" wheels.

There's another recent thread regarding Brompton clones (Brompnot), one was a raging deal, but on close examination, it folds to the left, not right like a Brompton which then envelops the drivetrain, a big plus in my view.