- Set up an account on friendfeed.com. You can use this site to grab a feed of your Gtalk/AIM status messages and export it as an RSS feed.
- Set up an account on twitterfeed.com (login using OpenID). Feed the above RSS to this site, and it will automatically update your twitter account.
- Finally you can use the twitter app to automatically update your Facebook status message.
One bummer is that this only works in one direction. This is fine with me since I'm constantly logged in to Gmail, but only periodically check Facebook. Second bummer is that Google status messages are stamped with "(via Gmail/Google Talk)"
This post mentions you can use Yahoo Pipes to edit your friendfeed and strip out the message stamp (among other things). And this works fine, but for some dumb reason, Yahoo Pipes is currently blocking twitterfeed's IP (at least according to the help page). So that's unhelpful. But if that problem ever gets solved, it would make the whole project a bit more nifty.