Bitstamp style orderbooks for XRP/BTC and XPR/USD - not live I'm afraid, you'll need to refresh to get latest figures.

now real time with bid/ask/trade data.

http://xrp.webr3.org/

edit: more currency pairs added (removed btc/usd) and non-specific fixes.
edit: upgraded to use orderbook from websockets via s1.ripple.com
edit: modified to handle unfunded bids/asks
edit: made streaming / realtime.
edit: added basic stats, weighted average price, demand, supply
edit: moved location to xrp.webr3.org

Donations welcome: rnW7DHtmZGJk4uhGTSU2BW3iPCPWb2xegg