So here it is, Lastify in all its glory:

Lastify adds a drawer to the bottom of the Spotify window

Update: Lastify now supports tagging and has a much prettier user interface.

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.

I spent the day playing around with SIMBL, Spotify and, of course, the Last.fm API trying to build a Spotify Scrobbler.  Progress was slower than I would have liked and I spent most of the day trying to figure out Spotify’s internal APIs and following various dead-ends (reverse engineering compiled software is tricky), but it was good to learn how to write SIMBL bundles and by the end of the day I’d managed to hack together a working plugin that was aware of when a new track started and what the track and artist names were. It seemed a shame to leave it half done, so I spent some time when I got home adding scrobbling capabilities, and you can now find a working Spotify Scrobbler over on GitHub (if you want to use it you’ll find instructions in the read-me file).  It’s not particularly polished, but I’m pretty pleased with how it turned out. All in all, a good first Hack Day.

Update: As of 18th December 2008 Spotify has built-in scrobbling support.