The college I work for recently started equipping faculty and new students with iPads. The library got one to play with as well, and the tech geek side of me is totally pumped at the opportunity to play with a new expensive gadget, as well as the potential it holds for the library. Here are some cool examples of libraries integrating iPads into their services:

Roaming reference librarians, OPAC-on-the-go, and live eBook demonstrations
Literacy instruction tools, iPad newsstands loaded with periodicals, self-checkouts, and interactive library displays/signage
QR code walking library tour
Digitizing research and rare book collections into apps
Library Books app tracks your checked out items and holds across multiple library accounts
Virtual chat to flag down a roaming reference librarian