If you're an E-Business customer thinking about an R12 upgrade (and if you haven't already begun to at least think about it, you really should start now), there's an upcoming web presentation (an Oracle Customer Success Forum presentation) that might be worth your while.
Zebra Technologies recently went live with their R12.1 upgrade. You can hear their story on Friday, Feb. 5th:
Topic: E-Business Suite R12.1, Application Integration Architecture Foundation Pack, Database 11g
Industry: High Technology
Date: Friday, February 5th at 1:00pm EST (10:00am PST, 12:00 Noon CST)
Time: 10:00 a.m. PT (1:00 p.m. ET, 12:00 Noon CT)
Registration Link: here