So here is the official post by mojang, its out!!
The Redstone Update is finally out! Get it via the launcher. The changelog was posted in the previous post, so here you have a couple of videos of it instead:
First, the Minecraft 1.5 Song by YourMCAdmin
If that’s a bit too short for you, this one by nativisions is a little bit more in depth (5:38)
And if you want an even longer, here’s one by icecreamstatus (15:06),
We got these YouTube links by the help of the Minecraft Reddit Community, you can see the whole thread here:http://www.reddit.com/r/Minecraft/comments/19ujql/video_summaries_of_15/
// The Minecraft and Minecraft Realms teams
PS. We know the readers of this blog are a little bit more hardcore about Minecraft than most, so we should tell you that a 1.5.1 already is on its way. We plan to snapshot this tomorrow, and hopefully get it out as soon as possible.