For a lot of us, that would be next Friday. At some point - most likely after noon PST - version 0.9 of the API will be replaced with the final 1.0 release. There are no expected interface changes ...
http://api.stackoverflow.com/0.8/help works. http://api.stackoverflow.com/1.0/help does not. Is there something that returns 0.8 as the most recent version? And/or is there something that lists every ...