First off, let me say that this can be achieved rather easily through css, but it would be much more convenient to be included in the field options themselves. I would love to see the option to have the date field not separated off into its own little group/box (border with label) and instead have the input box (with jquery cal pop up) embedded directly in the parent container as a text box would be.
This is much more usual when the date field is included in various groups and is presented oddly by being boxed off in a child group. Specifically for me it was when placing the date field into a multiple group table that having the extra box (similar to fieldset) around the date field was a serious inconvenience .
Once again nothing that can't be fixed with a bit of css, but would be nice to not have to write the extra css, especially for everyday users. Great work on the module.