QR Codes

I have been struggling lately with all of the discussion regarding marketing and its newest tool - QR Codes.  I have to admit that I'm a fan and use them regularly when building campaigns for clients (And, I admit, my husband stopped me from including one on our Christmas card to increase my personal blog's traffic!).  All the same, I can't help but wonder if our audiences "get" and appreciate them.

What do you think?  Do you scan them?  Use them to get more information quickly?

Macy's has been using them well and extensively but is it working?

Husband said no to the Christmas card but maybe he'll go for wrapping paper?