hmm , almost ANY one hander can be used as a tanking weapon basically
if its a fast dps style 1h , you can get more threat from any bonus AP, crit or +hit that the weapon might have on it
if the weapon has str or agi, you gain some sheild block value from the str or dodge/armor from the agi
if its a tanky 1H, (with armor, stam and +def), you gain some extra mitigation and stamina
even daggers can be used for tanking >.>
imo you shouldnt worry too much about "tanking" weapons till your really into end game stuff
otherwise it might make sense to just use your dps 1h weapons to tank, till u get to lvl 70 ..then u can go get a Kings Defender from kara :) (drool)
http://wow.allakhazam.com/db/item.html?witem=28749&locale=enUS;source=live