Agreed, i dont do 1:1's with my team a) i have about 90 folks to deal with, so it would be near to impossible. b) all my folks know (and do) that they can grab 30 mins at any time with me if they have something on thier mind. I kinda keep track of who is not talking to me, and hit them up with a chat now and then.
I also do something I call "walking the floor", where every few hours i get around everybody and just say hi and ask how everybody is doing, and what they are up to, ask if they have any problems. Show interest in what they are doing. I usualy time it when i know folks are takimg natural breaks etc so i know im not distracting them.