According to Jeb, the release date is not set in stone but it will be on Sept. 8 if there aren't any setbacks or other issues. In the PAX Party video, Notch mentioned that the update will likely be split into two parts since it has so much content.
No, Minecraft is a program.
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Soon.
Minecraft was originally released to the public in 2009.
It won't, next is minecraft 2.0.
Minecraft Alpha came out in 2009.
If you are referring to Minecraft: Pocket Edition, it is unknown.
Yes, Multiplayer comes with Minecraft on the PC.
It will never come out for Wii.
There are no plans to release a 3DS version of Minecraft.
There's no current release date for Minecraft 1.6
In Minecraft PE the horses will come soon since the pocket edition will soon get that update.