Good design about iPhone UI apps

In this time I'm working on two really interesting projects about the iphone UI (Squarespace and Clipperz).
I have always appreciated and love the work from Apple Designer and with the arrival of the App Store, the whole community of developers and UI designers becomes very encouraged to create great applications and interfaces.
Among the many useful applications for the iphone that I use every day, there are some developers that I suggest to considering. The graphic quality of these applications is high level and fully fitting with the standards of usability "imposed" from Apple. And not least, a really good taste! Their graphic skills also can be seen in their website, where the modern good design stand out.

taptaptap offers a wide range of applications for the iphone, with a very realistic style. Personally, I bought "Classic" which has a really interesting graphic theme; "Tipulator" that has a disarming simplicity of use!
You can't want to taste their apps!

Tapbots has designed two unique applications: "Convertbot" to convert any units of measure and "Weightbot" to monitor your weight. So the appearance of the interface is flawless and the interaction is really original! The user experience is constantly stimulated. I love the design of icons, awesome!

Atebits develop applications for Mac OS and iPhone. I consider Tweetie (both the Mac and iPhone) a good reference in the design of interfaces: optimal design of icons and UI, simplicity, consistency and pleasure to using.

With this short article I wanted to express my interest in good design interface for iPhone.
Certainly in the vastness of apps in the App Store there will be other well designed! So let's discover them!

UPDATE: I found a very interesting link about iPhone Application Website >