QUOTE
This release is a security and stability update for 1.0.1 and does not contain significant new features. If you'd like to help us with testing, please look into the areas Jesse mentioned in the previous post, IDN, downloading, the lock icon in the status bar and address bar, autocomplete, XPI installation, the ways web applications can open and manipulate windows. I'm also interested in feedback on extensions, profiles, or any other areas that might be impcated by an upgrade.
Supposed to be ready sometime on 2/24. Asa's blog entry goes on to say that they aren't fully confident in the update installer so an upgrade won't be available, just a full download.