Official release news:
http://www.mozillazine.org/talkback.html?article=6680
QUOTE
Asa Dotzler has announced that release candidate builds of Deer Park Alpha 1 are now available. Deer Park is the codename for Mozilla Firefox 1.1 and Deer Park Alpha 1 is a preview of 1.1 aimed at developers. The builds available today are Deer Park Alpha 1 release candidates.
Deer Park Alpha 1 intentionally uses a codename rather than the Mozilla Firefox branding to dissuade end-users from downloading the preview (an end-user beta will be available closer to the final 1.1 release). In the tradition of Mozilla renamings, Deer Park Alpha 1 has previously been referred to in planning documents as the Deer Park Developer Preview, the Firefox 1.1 Developer Preview and Firefox 1.1 Alpha. Note that while this release is termed as an alpha, it's actually based on the Mozilla 1.8 Beta 2 code. The final Firefox 1.1 release will be based on the final 1.8 code.
Deer Park Alpha 1 intentionally uses a codename rather than the Mozilla Firefox branding to dissuade end-users from downloading the preview (an end-user beta will be available closer to the final 1.1 release). In the tradition of Mozilla renamings, Deer Park Alpha 1 has previously been referred to in planning documents as the Deer Park Developer Preview, the Firefox 1.1 Developer Preview and Firefox 1.1 Alpha. Note that while this release is termed as an alpha, it's actually based on the Mozilla 1.8 Beta 2 code. The final Firefox 1.1 release will be based on the final 1.8 code.
What can you expect in 1.1? Good question:
http://www.mozilla.org/projects/deerpark/whatsnew.html
When will the final version be released? Another good question:
http://www.mozilla.org/projects/firefox/roadmap.html
* OK, it probably wasn't really named after the city, but it is a Houston suburb and home of Andy Pettitte...