This Sunday (the 24th), Merlyns in Spokane will be hosting a local Mini-Comics Day event from Noon to 4 pm. Similar to the 24 Hour Comic Challenge, but more free-form and on a smaller scale, the general idea is to produce a completed mini-comic within one day. But what constitutes a mini-comic is really up to the creator. This is an annual national event, and you can check out the official website for more information and suggestions: Mini-Comics Day!
And here is the local Facebook event page where you can RSVP and ask any questions you might have: Mini-Comics Day at Merlyns!