Seem to be quite useful. The Senegalese certainly have them, and if put to use nicking the ball instead of testing Bellamy's shin pads, are a considerable asset. They're also pretty nifty when it comes to ball control and running fast. Since they apparently belong to guys who play fearless football with a smile and obvious enjoyment, surely we'll soon be seeing more of them in the PL.
I don't know if you remember this guy, he played a few games for Norwich and was 'released' (if I recall correctly) for causing grief by spitting at the QPrcelona fans after a bit of an altercation. Not sure about the legs, but his telescopic tongue gave him extra distance on the wet projectile http://en.wikipedia.org/wiki/Pape_Seydou_Diop
That striker they had looked handy, apparently West Ham are watching him...how many strikers do they need!?