This is the very thing I was thinking of. I think it's a bit of a loss that this sort of thing isn't more widely known so that it might attract commercial sponsorship and thus advance the cause of more efficient ways of getting about under our own steam as it were. That said i do very much enjoy using the conventional configuration of the bicycle and would't want it to be replaced, just to have other things along side it.
Thanks for the link. I will investigate them more and who knows perhaps get to one of their events myself.
Also have a browse of the IHPVA website.