I made some incremental improvements to the experimental Blog@Case Comments system announced here. For commenters who comment underneath a Case email address, the system will use the Directory Services to normalize the person's identity across that person's multiple email addresses. In other words: http://firstname.lastname@example.org will show the same results as http://email@example.com. This should work for all variations of First.Last email addresses, Personal Mail Aliases, Preferred First.Last email address combined with case.edu, cwru.edu, or po.cwru.edu domains.
(The complexities of our email addressing schemes just leak extra work all over the place... you should just see the crazy configurations made to the anti-virus/anti-spam systems to get them to deliver mail correctly...)