Here at last is a version for people to play with. I've updated the screenshots on the first page - quite a number of things have changed over the last month as I have refined things.
There's a lot of subtle, hidden behaviour that I won't bore people with at this point. Be sure to look at right-clicks on the various grids to see some of it. Also in most lists/grids double-clicking on things tends to shortcut a lot of the action. I have also incorporated chaley's template language so a number of the URLs such as with Goodreads now dynamically resolve their dates to the URL using that, such as "Popular this Month" or "Popular this Year". You can customize what columns to display in the "Resolve" page of the wizard using the "Options" button for the wizard (you must close/reopen it to take effect). Note that any columns you add will be read-only.
For a quick example of how the workflow works for using a predefined web page list setting:
Another example - getting books for an author via Fantastic Fiction:
If you want to load your own list of text from the clipboard (such as copied from a forum post or web page):
To load from a CSV file (such as a calibre CSV catalog file, a Goodreads export or whatever):
To scrape from a different website not already configured in this plugin:
Just have a play around and experiment - you can't harm your library in any way (at worst you will create some empty books if you choose to do so and click Finish on the last wizard page). It may be that you never actually "import" a list, and instead just use the plugin as a quick way to launch various websites from the category view of predefined sites.
There's probably around a 100 website pages all preconfigured at this point covering various types of lists be they "popular", "bestselllers", "new releases", "top xxx" or indeed just bibliography style with Fantastic Fiction. I'll add to this over time - if you have a site/page not covered and want to see it included just feel free to ask - I don't expect everyone to be bothered with figuring out xpath expressions though it can be a fun challenge at times to do so if you are so inclined...