Hi Gavin--
This is a bit of a sore spot for me. Back in the day I had this awesome export capability from WheresTheGig to the Facebook event system using their API (a means to have software interoperate). Well, Facebook disabled the event API system.
So, undaunted (but annoyed), I provided a way to display the upcoming gig list as a graphic image on the feed. They kept modifying the API and requiring many hoops to jump through. I finally just threw in the towel. However, the capability to provide a graphic schedule is still available at the Export => Image Schedule page, where it will show you a URL to your schedule image that you can easily add to your Facebook timeline.
However, I got curious, and it looks like maybe they now do have an event API capability. I'll put this on my TODO list.
Hope this helps,
--Ethan