I just discovered bit.ly has a QR code feature on their information pages. Every url you shrink automatically has a QR code created for it.
For example, if you scan this code with your smart phone you’ll be taken to my resume.

Scan this QR code with your smart phone to see my resume
And this QR code will take you to my LinkedIn profile,

Scan this QR code with your smart phone to see my LinkedIn profile
What’s even better is that bit.ly kindly provides you with analytics data. It will tell you how many people visited the page using the QR code as opposed to clicking the shortened url it created for you.