The popularity and content of this sight seem to be continuing to improve, so I'm renewing the plea for a plugin.
Personally, I would prefer it to use the
Movie.imdbLookup API method. I would only use it in addition to the IMDb, so an independent search by name wouldn't be of much use. Also, I'd be happy if whatever posters and fan art are available are simply
added to existing posters and screen shots. There's not too many of them, and the quality is consistent enough, it seems pointless to screen them. If this is the way it worked it would consistently find and download anything available for any particular movie—without any user intervention.
Ideally, a plugin should be flexible/configurable, but maybe it would be much easier to code this way.