According to the AFR's site showing new floats, IOH is at the top of the tree with a rise of 525%.
They've had another nice day so far as well.
Company Symbol IPO date Amount raised Offer price 1st day close Last Sale Sale Date Sale Time % Change
Iron Ore Holdings
IOH
10-05-05
$6.0m
$0.20
$0.40 $1.2500
24-08-05 14:36 525.0 %