iMovie 11

I keep seeing YouTube videos with iMovie 11 & iDVD. Okay first off iMovie is pretty useless without the ability to burn DVD'S of the movies you create. Yea there are third party apps you can purchase. Did that with miDVD for $10.59 and they burn but no sound! Where is iDVD?

Then there is iMovie 11 out there but no updates from Apple or the ability to purchase in the App Store, so where are these YouTube people getting it from?

Anyone with info on how to get iDVD first and foremost would be greatly appreciated. iMovie 11 is just a bonus if someone knows how to get it.

And what's up with the update to iPhoto 11? Some have it others not offered?