Until tonight, your best bets were bitcoincharts.com and the painful cognitive overhead of its UI, or Mt Gox and the painful cognitive overhead of its UI.
Here's a temporary solution:
The site updates daily via
cron. Pull requests are very welcome. I'm especially hoping to add some nice CSS and a command-line calculator interface like Google's.
At the risk of stating the obvious, btcusd.gilesb.com does not constitute financial advice. Absolutely no guarantees are made regarding the usefulness, accuracy, or freshness of the data. The miniapp functions purely as a convenience for busy people who are curious enough to keep an eye on Bitcoin but not serious enough to pour their entire life savings into it.