We must give the BlackBerry Dev team a standing ovation! We have had lots of updates to the developer tools in the recent days and we just received word that the team has released a timeline of updates to come from now all the way to November when we can expect a "Gold Master" release of BB10.
Each release is named Rn where R stands for “Release” and n stands for “number”. So for the first BlackBerry 10 Dev Alpha release, the SDK was R4 to match with 10.0.4.xyz version. We also sometimes do internal-only releases, which is why you’ll see some numbers skipped.
The BlackBerry 10 SDK Beta schedule looks like the following:
R4: May SDK Beta Release (first beta)
R6: July SDK Beta Release (just launched)
R8: September SDK Beta Release (API Freeze, Binary Compatible with Gold)
R9: October SDK Beta Release (bug fixes)
R10: November Gold SDK Release (bug fixes)
This of course should be followed with the disclaimer that these are just target dates and are bound to change depending on team priorities and customer needs. A more detailed roadmap will be made available to developers soon in the form of "flight arrival boards" so that we can clearly see what new features will be added and when. Let's keep Research In Motion moving by continuing to cheer your favorite #BB10 developer on.