It's really early along, but the Firefox peeps are taking their first baby steps to try to flesh out exactly what Mobile Firefox is going to look like, and they'd like to know what you think. Mockups posted to Mozilla's wiki talk about the main display, history and bookmark displays, and tabbing functionality in great detail, noting differences in operation between standard and touchscreen devices (which are further subdivided between those that have QWERTY keyboards and those that do not). Though you can put aside any hope of getting an early build onto your own device, the team has posted XUL / Javascript code that'll run in Firefox on your PC and give you a partly functional idea of what's going on.

[Via Mobility Site and Mozilla Links]