Mere days after I built my Spotify Scrobbler, the wonderful people who make Spotify added native scrobbling support. As you'd expect, it was a lot more stable and easier to use than my SIMBL hack, and it's made me even more of a Spotify fan. The only problem with the Last.fm integration now is the lack of “Love” and “Ban” buttons. Which got me thinking, why not write another SIMBL plugin? After all, it wouldn't be that different from what I'd already done.
If you want to try Lastify you'll need to install SIMBL first and everything else you need is hosted over on GitHub.
It's a quick-and-dirty hack, and so all the usual caveats apply.