Yes, Mozilla Firefox 2 has been officially released.
It has no different to previously leaked download link. However, you are adviced to download from Mozilla.com, so that your download will be redirected to local mirros for faster download speed.
By the way, I discovered that Firefox 2 fixed the search in textarea bug, which was there since Firefox PR1.0. Now, page search will include text in textarea.
On the other hand, the spelling checker still does not work well for me. It underlines misspelled word but does not give me spelling suggestion. I disabled most of the extensions but no luck. Can other Mac user confirm this?
Update: Mozilla also updated the design of Add-ons page.