He's overated anyway! He's a very replaceable part, nothing more!
If a player goes on the IR with a concussion, he needs to stay on the list for at least 7 days, and then pass a concussion test. I think it's been about a week, so we shoud be hearing something soon. The 7 day rule is also why Koivu was a scratch for a day rather then the IR when he got hit by Savard.