We have plans to include an account backup/archive feature in a future update. If you are using the apps, all of the data is stored locally on the device and updated every time the app synchronizes to Pepperplate.com. If you are using iTunes the database is backed up there as well.
If you would like to back up your local recipes manually, you can find the file on the iPad by using iexplorer. It is a free utility, which allows you to see the files and folders on your iPad: