its not planned... it will only take as long as there are still bugs in the builds...other words none will be released untill there are little or no bugs
Quote from their twitter: "We honestly don't know when it will be ready. And I'm surprised this isn't locked, he usually gets to them, before I can read them!
Is anyone keeping count of these threads? We gotta be at atleast 100 so far.. As all the other said: Noone knows when it's done. Just have patience, young padawan.
All info above holds true; locking. Check the CraftBukkit Twitter feed or the Bukkit News section of the forums to find out when the RB for 1.0 is released.