Apple on Tuesday updated its online store to reflect availability of the new high-capacity 128-gigabyte iPad with Retina display. From Apple Insider:

The new high-end iPad model costs $799 for the Wi-Fi-only model, or $929 with cellular connectivity. It's available in both black and white, just like every other capacity, and is advertised to ship in one to three business days.

Apple first announced the product, which doubles the previous maximum capacity of 64 gigabytes, a week ago. Prior to the announcement, evidence of a larger capacity iOS device had just been discovered in the newly released iOS 6.1 software update.

 128GB iPad with Retina display now available from Apple