I'd like to suggest a missing feature, that I'm sure many like myself, deem critical in the long term.  We need to be able to group custom data fields.  There is zero point in a CRM that isn't able to effectively store data as needed, and a list of 50 custom fields in a bar on the side, with no grouping just doesn't make sense.  Please look to add this as soon as possible.  It would make all our lives a lot better.