I can never remember the 'mimetype' argument to HttpResponse; I always have to look it up. The corresponding HTTP header is 'Content-Type'; I think that content_type would be a more memorable and more accurate argument.
For example:
return HttpResponse(simplejson.dumps({
'airports': airports
}), mimetype='application/json; charset=utf-8')
Should be:
return HttpResponse(simplejson.dumps({
'airports': airports
}), content_type='application/json; charset=utf-8')
The charset=utf-8 bit further demonstrates that mimetype should be renamed - charset=utf-8 is a parameter, not part of the actual mime media type.
I suggest adding content_type as an alternative to mimetype; I see no particular need to deprecate mimetype and break existing code, although it may be something that should be removed in the future.
