I bought a new saddle for my bike (a Dahon Espresso, but with a saddle off my old Trek 950). Anyway, I bought a Bioflex Ozone - it's spongy and padded and it's got the magic groove that, er, keeps one's gentlemen's area comfy (very useful on pot-hole riddled London streets).
Anyway, for some unexplained reason, I seem to be riding a chunk faster than before. Who'd have thought, eh...?