I wrote a GreaseMonkey plugin that turns Rate Your Music into a scrobbler, so you can track stuff like vinyl plays on last.fm.
More info on my own site.
to use it:
visit Rate Your Music in Firefox.
Search for the album you're about to listen to (or just listened to).
Visit the release page for that album.
Type in the last.fm username and password in the box embedded within the page.
Click "Scrobble in real-time" or "Scrobble a previous play".
It's not officially associated with Rate Your Music, and as a result, it's prone to breaking whenever the site's layout is updated.