There is a terrific White Paper available at the TracMyMail.com website that I have gotten permission to pass along to you all:
Intelligent Mail, 4-State Barcodes, One Code Vision, and Confirm
How these new technologies impact your business
Find out what all these new technologies are about, and what they mean to you. You’ll also see trackmymail.com’s upcoming products using these technologies.
Fill in your contact info, and immediately access the .pdf for review.
Our DAT-MAIL and Post Master software have an optional module that works in conjunction with TrackMyMail.com, feel free to contact me with any inquiries.
PS Here is the USPS information link for the OneCode solution:
This is the official resource, with just about everything you need to know about OneCode.