Django Poll for new records
Hmm.  You could do it two ways that I can think of off the bat - there are surely more.
You can add a field called "already_retrieved" and set it to True for those fields that have already been retrieved, and then only grab Whatever.objects.filter(already_retrieved=False).
Also, if they are in order by a pk, you could just keep track of how far you are in the list of pk's.
In ajax I am polling a django url to retrieve the latest records.  I do not want to display any records I have retrieved previously and I only want to retrieve 1 record for each poll request.  
What would be the best way to do this?