In the movies.xlobby.com database:
If a movie is 'unrated' presently, this is reflected in the DB as a blank entry.
I would like to propose that an unrated movie be reflected with a rating of "unrated"
The reason for this is that as a blank entry, it will not overwrite a previous field.
As a side benefit it will also allow searching by rating 'unrated'
So for instance as I've ran through today, I'm using the Xlobby data to overwrite the imdb fields (as they get messy with sometimes 3 different ratings for a single film which impacts sorting). When I import then using the xlobby spider, those three ratings still remain as there was no data to overwrite the field with. You guys have done a good job providing basic data, but I also like having the imdb_rating so when choosing a film we can get a sense of what we're getting into.