Sure you've all seen and LOVE the new sidebar. Anyhow there is one space I'm reserving site wide for events. Currently it shows the national calendar but plan to add more in rotation.
If you want your event publicising this is what we need
email a 300x250px banner in gif, png or jpeg to firstname.lastname@example.org
Let me know when the event is and the event website
Make sure you link back to retrobike on your event website (if indeed the event has a website)
When I have the banner I'll put it up in rotation AECs, please see the post elsewhere