Troy Aumua Polamalu is in hot pursuit of a Super Bowl ring.The Pittsburgh Steelers made an impressive run through the American Football Conference playoffs, beating the top three seeds (Indianapolis, Denver and Cincinnati) on the road en route to the conference title. But it won't mean much unless Pittsburgh (14-5) can defeat NFC champion Seattle (15-3) today in Super Bowl XL at Ford Field in Detroit."We haven't done anything yet," Polamalu, Pittsburgh's All-Pro first-team strong safety, said last week from Pittsburgh in a phone interview with The News-Review. " There's still work to be done. Some people get caught up …