They removed them in late 2011. They still support them in your library though, one of the first things that I noticed in iTunes 11 even. When you downloaded them though, it clearly said to back them up. That was the old policy then, and still stands for that particular content.
That's complete BS about Apple not supporting it though. Every single iPod ever made is supported by iTunes 11 (I use it with a 3rd generation iPod). They can cut off the software update, but they can't keep you from syncing your own hardware.