Well, do keep in mind that setting up the scrobbling software takes about 10 minutes, and once that's done any music you listen to will scrobble on its own and you'll be good to go.
Though I would to like to ask...has anyone tried the Fringes group radio? It's not working for me, but I'll be honest, last.fm radio never works for me in-browser (I do the radio from the scrobbler), and I wonder if it's just because it's incompatible with Safari. Can't get it working in Firefox either. If anyone has tried it and had it work, I'd love to know!