Fennec Alpha 2 is out! The emphasis for this release was on performance and responsiveness, and that focus has resulted in much faster and more natural-feeling interactions.
You can get instructions and a download via the release notes. If you don't have a Nokia n810, desktop versions are available too (Windows, OS X, Linux).
For a quick introduction, I've recorded a short video walkthrough of alpha 2:
For more information on what's new and what's underway, there are a number of other blog posts related to alpha 2:
Please tell us what you think, or, better yet, get involved!