Take this for what it is worth regarding the "notes"
http://www.usnews.com/news/blogs/wa...omney-did-not-bring-cheat-notes-to-the-debate
I have not watched all the video referenced in the article yet but it claims to show him wiping his face with the object later in the debate, which would indicate that as Romney's camp is claiming that it was a hankerchief.
According to the article the rules for the 2012 debate were not released to the public. The quote in the article about the rules claims the rule quoted is from the 2004 debate.
EDIT: Watched the video section they mentioned and he does wipe his face with something then place it on the podium. Whether that is the same object he took from his pocket, I can not say.