moontan: Season & Episode numbers (as well as other information) have already been implemented. The screenshots was taken from a slightly older build so expect a few minor (and some major) changes from what you've seen there to what will be in the first release.
jhoff81: Very much configurable. Basically it lets you add any number of [root]folders to watch, in these folders you'll have separate folders for each TV Show. The plugin then tries to match these foldernames to the database and grabs the correct information. Certain foldernames are hard to be matched and will then bring up a list of possible matches for you to choose from. As for seasons, it's up to you if you want to have separate folders for each season or not. As for filenames, as long as they include the Season and Episode numbers you should be fine. I.e. it should recognize S03E04 as well as 3x04 and hopefully in most cases 304.
My personal folder structure looks like this though
\\STORE\Video\Television
\2 Pints of Lager and a Packet of Crisps
\3 Lbs.
\30 Rock
\Season 1
\30 Rock S01E01 - Pilot.avi
\30 Rock S01E02 - The Aftermath.avi
\Amazing Race Asia, the
\Amazing Race, the
Which is what I've lived with for years now. Works wonders and makes things very easy to find, however with this plugin I've "forgot" to rename files as of late
An added bonus is that the plugin will have a userconfigurable setting for renaming your local files to a preset format - the code is there, although I'm still working on the UI.
Oh, Show/Season/Episode images are all downloaded as part of the matching process. If no image exists for the Show or Season it will give you a blank one for the time being, but recheck online every so often to see if one is available. If the episode image is missing it'll extract it from the file itself, but again recheck online every so often.
The support for "locking" information is already there (just haven't got around to writing a UI yet) so if you so choose you could supply all your own image data and never have it update from the online sources.