I can’t really take credit for this, it’s just a slightly modified version of what’s available from this guy: http://atastypixel.com/blog/keeping-ichat-and-adium-status-in-sync-with-twitter/ You can use the instructions provided on that site to get this setup.
I increased the frequency and had to remove the tilde (~) from the path in the cronjob.
Continue reading Set your ichat status to your most recent last.fm play