Fennec 1.0 Beta 3 for Maemo is out! Stuart has a post in which he explains a lot of what's new. For me, the most exciting part (other than the performance improvements) are the many, many revisions and fine-tunings of the user-interface. I'll be doing a full video walkthrough early next week, but, in the meantime, I've created a set of screenshots with notes as a flickr group here: Fennec maemo beta 3.
Or, if you just want to see the new screens, here's a slideshow: