Mozilla unveiled the first public alpha version of Fennec - their upcoming browser for mobile devices. This version only runs on the Nokia N810 Internet Tablet but there's also a version for desktop PCs.
The focus of development so far has been on building a new user interface that reflects Firefox's design principles, and adds touch screen support and other features that are appropriate for mobile phones and other handheld devices. We plan to do further alpha releases which focus on performance, including projects like TraceMonkey, speculative parsing, and many Fennec and Gecko optimizations. But in the meantime, we feel it is important to make this early release available to continue to grow the community and gather feedback as early as possible in the development process.