At this point, it's more of an academic question, but I'm dreaming up/evaluating "to-do list" projects for my site and I thought it would useful to have the site automatically tweet upcoming calendar events.

I'm thinking we'd have to create a custom field for the actual tweet for the event to meet Twitter's character limit. Is there a module (sorry, only had time for a quick search and "twitter" yields a ton of results) that could be used for this or would this be a project built from the ground up?