You can use the jquery DatePicker for the date field that we have included with Data Bridge. The jquery Datepicker doesn't include a time, so time you would either still have to do with select lists, or you could implement another jquery solution.
It looks like this guy has added a timepicker right into the datepicker... it sounds like that might be what you are looking for: http://trentrichardson.com/examples/timepicker/