Ann, Good luck. You might have been thinking of my "Primer" presentation that talks about companies (or individuals at companies) who are _interested_ in Linux/390. That list was culled from the mailing list subscribers. No real guarantees that any of them are using it in production. The one exception to that is Gerling AG, which was featured in a SuSE press release as moving some of their workload to Linux/390.
The list of (people who work for) insurance companies that are subscribed to the mailing list is: Erie Insurance Group Heritage Insurance Insurance Corporation of British Columbia Mutual of Omaha Northwestern Mutual Oregon Mutual Provident Mutual Mark Post