So, what is a QR code and how do you make one? Wonder no more. After watching this mini-nar (mini+webinar), you will have all the know-how you need to create a QR code and stick it... well, wherever you want, really.
Plus, it is explained to you by Tom... in pirate garb.
Links from this Mini-nar:
bit.ly-bit.ly will not only create a QR code for you, but will also track it. (Note: You have to create an account to track QR codes.)
kaywa.com-kaywa.com will create a QR code not only for a URL, but also for text, a phone number, or for an SMS text message.
Update: For those of you wondering what the giant QR code that Tom referred to looked like, here it is: