I've been working on a new Bitstamp app in light of both their and our API changes. It's a fairly simple HTML/jQuery app with Bootstrap styling--no compilers/preprocessors are used, so it should be very easy to inspect to design your own app using this as an example. It makes use of several common Hive Wallet API features including: send bitcoins, get user address, and get user locale. Additionally, this is the first app to make use of our new storage API so it will remember your API secret and automatically log you in to your account.

You can follow the project on GitHub at https://github.com/tgerring/hiveapp-bitstamptrader and here's a screenshot (though already outdated):