Last.fm Authentication

[Trombones13]

I could have sworn I saw a site somewhere that had a "sign in with your last.fm account" option, but maybe I was imagining it. Anyway, I'd love to include an option on my music-related site to register and log-in through last.fm, similar to Facebook Connect. I see that last.fm has an authentification API that I think would help, but I haven't a clue on how to integrate that. As such, I'm requesting this--I don't have money to donate, unfortunately, so if you're looking for support in other ways or if I can help with the add-on somehow, let me know. Hopefully this is possible--it would be quite useful to my site, at least. Thanks!