In my CSV import (still in process as I write this), of data exported from Pivotal Tracker and then hand-edited, I have three fields with multiple values per record: "Labels", "Blockers", and "Comments". In "Blockers" and "Comments", because the data in those values often contained commas, I used a pipe character as the delimiter, but I left "Labels" field comma-delimited. So I was dismayed to ( my last chance to edit the data, and an "are you sure?" confirmation) be asked to select a single delimiter character for my multi-value fields. The import process should let the user select a different delimiter for each field.