They weren't when I was on the beta, up to yesterday. Classic, video, touch, nada. I heard some say the iPhone would still connect, or use WiFi sync. But for my Classics it was a no go. They'll probably release another beta soon enough to fix it though.
It works fine now, but I completely reformatted my MacBook and went back to Mavericks. Everything works as it should now. Aperture and iTunes included. It's smoother too animations wise. I'll probably go back to Yosemite after a few point releases, or whatever is next. But for now I'm enjoying having the UI of Mavericks back. Everything seems so much more detailed and legible IMO. Not that Yosemite is terrible or anything. Just a preference.