Here are some circ policy links from C&RL News April 2011 for iPads and from Bishop Mueller Library--what they have on each screen.

Lewis Music Library Student Manual-iPad: Circ policy; cursor down;
http://libstaff.mit.edu/lewis/circ.html#iPad

Virginia Tech University iPad loan policy
http://www.lib.vt.edu/artarch/ipad-policy.html

Bishop Mueller Library - Whats on each iPad screen
http://bcutalks.wordpress.com/ipad-apps/

Other examples of library policies

Calvert Library
http://www.calvert.lib.md.us/ereaders.html - Nook and Kindle instructions

Simon Fairfield Public Library - eReader circulation policy
http://douglaspubliclibrary.org/douglas/aboutpolicies.asp

Highland Public Library - Nook and NookColor eReaders
http://www.highlandlibrary.org/2011/02/nook-and-nookcolor-e-readers-now-available/

Bethel Public Library - ebook reader borrower policy and procedure
http://www.bethellibrary.org/admin/pol_e-reader.htm

Monroe Public Library - E-Reader Checkout
http://www.monroepubliclibrary.org/services/equipment-checkout/

Topsfield Town Library - E-Reader Device Use Policy
http://www.topsfieldtownlibrary.org/Links/E-Reader%20Use%20Policy%20for%20approval.pdf [PDF]

Reddick Public Library District - eReader Lending Policy
http://www.reddicklibrary.org/content/ereader-lending-policy

Forbes Library - E-Book Reader Book Policy
http://www.forbeslibrary.org/policies/e-reader.shtml

Perth East Public Library - E-Reader and iPod Lending Policy
http://www.pertheast.library.on.ca/PEPL%20Policies/Ereader%20Lending%20Policy%20Dec%2014%202010.pdf [PDF]

Brockville Public Library - Kobo e-reader checkout policy
http://www.brockvillelibrary.ca/ereader-loans.htm

Mentor Public Library - e-device circulation guidelines for staff and required form
http://www.mentorpl.org/pdfs/Electronic%20Device%20Circ%20Guidelines.pdf [PDF]
http://www.mentorpl.org/pdfs/Electronic%20Device%20Circ%20Agreement.pdf [PDF]

University of Georgia Libraries - Laptop/iPad loan policy
http://www.libs.uga.edu/access_services/services/laptop.html

Does your library have a policy page related to mobile devices on its website? Post the link to the comments below.