According to
https://mtgox.com/code/data/ticker.php:
{"ticker":{"high":24.99,"low":10.25,"vol":161660,"buy":20.94,"sell":21,"last":20.94}}
Last trade was at 20.94$. But the cumulative volume for today was 161660 BTC which is impressive!
Also last trade from
http://mtgox.com/code/data/getTrades.php was:
{"date":1307912004,"price":20.67,"amount":18.077,"tid":"168730"}
php -r 'date_default_timezone_set("UTC");echo date("Y-m-d H:i:s", 1307912004)."\n";'
2011-06-12 20:53:24
So, 2011-06-12 20:53:24 UTC, 18.077 traded for 20.67$
API is your friend because most of the charts/market watchers are late due to really high number of trades and volume today.