We are using Omeka as our primary collection management tool. We are storing our accession numbers in the DC Identity field.
I'd like to change the Items list so that it lists the Identity field rather than the Creator (which we can barely use).
I was also surprised to see that the advanced search didn't allow for exact matches on field searches! I want to create a quick way of retrieving an item by our accession number and the advanced search would do that if it didn't only do pattern matching.
I'll look at making these changes myself, but I thought I'd throw these out in case you are already working on them. If I can figure out how to do this as a plugin, I will approach it that way.