As a small heads-up to those who know Python and might be interested (ideas, contributions etc.): I'm currently working on a way to make it easier to quickly create rough adapters (only the most necessary metadata) for new sites:
Faretricks.
Sites that fetch/encode the actual content using JavaScript aren't supported (for now), just regular HTML sites. The goal is to render a general adapter template with most of the manual webscraping / code already done, which then hopefully needs to be only slightly adjusted.
If you want to get an idea how it works (currently not super user-friendly), you can create a virtualenv and pip install it; alternatively take a look at
cli.py.