KHE is selling their titanium prototype frame. It's really one of a kind and therefore a bit of a collectors piece. The specs (especially the weight) are impressive tho. Weight: 1022g/2.25lbs; TT:48cm/18,9"; CS:33cm/13"

If you are interested you can buy that baby for 799euro. Just keep in mind that there is no warrenty..

Speaking of light frames - is the super low weight hype a thing of the past?