check out these clips of sport style tomiki aikido. tomiki broke away from Usheiba's group to form his own group based on sparring using aikido techs.
it's a great idea i think and as the clips show the art has some validity but mostly it dispels the usual showy demos that aikido people do.
ALSO check out the use of a tanto(short knife) when they spar. very interesting
heres the link
http://www10.ocn.ne.jp/~siba/index11.htm
feedback please!