For all you Android lovers out there, FF for Android has finally hit the beta stage. I have to say, it's much improved over the alpha that Mozilla put out a while back. It's definitely speedier, but still has quite a large footprint (40 MB internal memory is the requirement, I believe).
Some reasons to use it:
Two-way sync of boomarks, URLs, tabs, form data, and passwords between your phone and computer.
Convenient interface for switching between tabs while browsing.
Add-ons to customize the UI and behavior.
Supports some web technologies that the stock browser doesn't, like SVG.
If you want it, you can get it here