Last year I spoke with Jennifer Rosenfeld from Woodbury (@jenro on the twitters) about her early homebrew attempt at installing iPads as information look-up devices:

She had lots of practical advice, and would be worth contacting.

Daniel Suchy
User Services Technology Analyst 
University of California, San Diego Libraries
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-----Original Message-----
From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Cynthia Ng
Sent: Monday, February 13, 2012 7:51 AM
To: [log in to unmask]
Subject: [CODE4LIB] Touch Screens in the Library

Hi All,

I was wondering if anyone has implemented (or plan to implement) touch screens in their library? We're looking mostly at doing it for wayfinding (finding items, rooms, etc.) but I'd definitely be interested in  hearing about any other uses.

What kind of hardware did you choose?
What software are you using?
If you did it in-house, what language(s) did you use?

Any ideas/help would be great.