Boy they are coming fast and furious now.
Touch Mobile has a demo browser available.
The Iris Browser is an advanced and versatile application that brings the Web to mobile and embedded devices of virtually any size without impacting the quality or usability of the page. The Iris Browser is fast, secure and user-friendly, having the ability to render full Web pages in resource-constrained environments. In addition, it can be used as a high performance platform for local Web applications, AJAX/Web 2.0 integration and dynamic user interfaces.
The Iris Browser is flexible and adaptable. Its core rendering engine, based on WebKit, is entirely independent from the upper application and user-interface layers, which can be customized to meet specific requirements. In addition, the engine is open source and can be reused in other applications.