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The UCD Sakai team has modified our code so each user's email address is displayed in the User Id fields rather than the user's Kerberos name. The email name is the first part of the email address before the "@ucdavis.edu". For many UCD faculty, staff, and students, both names are the same; for others, the Kerberos name is radically different and difficult to associate with an individual. Just as ask peon or nuchickn. 
Test Setup
For our QA group, only Brian has the same email as Kerberos name. For the purpose of this test, I'm including our email names and what to check for here:
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