Mozilla has a mobile version of Firefox, called Fennec, in the works. Ars Technica took one of their incisive detailed looks at the pre-alpha last month.
Mozilla has a vision document and a roadmap up, and you can install an early build to play with it, but I'm too busy now clicking around looking at images of fennec foxes.
Fennec foxes, if you don't know, are adorable little foxes with giant bunny ears. Flickr has a lot of them.
image from Flickr by floridapfe
