I guess you could say that it finally happened: Someone built a web app for the iPhone so beautiful that it's nearly indistinguishable from something natively run. That person is Steve Streza, and that app is Swearch.
Swearch does one thing, and it does it very well. It allows you to search Google, Twitter, Wikipedia, and Flickr quickly. Thanks to resource caching, Swearch is lightning fast once you add it to your homescreen (with a spiffy retina-ready icon, to boot!).
Navigation is done through a card-like interface that allows you to swipe through the selection of search engines much like one would swipe through pictures in the Photos app. Once you type in your search, the results are displayed inside the app and are cleared automatically to keep Swearch ready at all times.
I've been beta testing Swearch for quite a while now, and let me tell you this: If they'd let me pay for this web app, I would. It's really that good. Try it out for yourself over at Swearch.me.
And one last thing: The clouds on the Twitter search page move! How freakin' neat is that? I'm giddy over it. The polish on this app is incredible.