The old Ann Arbor District Library site had an XML feed of your checked out materials, but the new one doesn't appear to. This little program prints a text list of everything you have checked out.
Install:
go get . # install goquery if needed
go build -o ~/bin/aadl aadl.go
Usage:
aadl -username YourUsername -password 12345
I have a cron that runs every Saturday and shoots the output of this to a receipt printer I got on ebay.