I can't update here at work, downloads are blocked by my company. Is it a major update or just security stuff?
Jailbreak for it is here too...
http://www.idownloadblog.com/2012/05/07/how-to-jailbreak-ios-5-1-1-with-redsn0w/
My iTunes didn't automatically give me the update. I had to press the "check for update" button, then it popped up for me.