How do I import an iCal feed to twitter on an as it happens basis?

I have an account on twitter that I use for saying "what I'm doing." Some of my iCal feeds already know what I'm doing and I don't want to have to do double entry and record that event twice.

Is there a service (not unlike twitterfeed.com, which at the moment doesn't support iCal) that will post updates to twitter from an iCal feed on an as-it-happens basis?

From web app MatthewMartin

• If you have access to a php web server and cron jobs, you could try and install iCal-to-Twitter

  From jfoucher