Remember the whole add-your-open-mike-photos-to-Flickr thing? Yeah, done with that.
A brief delay before photos appear? Fine. Two weeks later and user photos still aren't viewable? No thanks. I'm a fan of Flickr in general, and if you're keeping all your photos there, it makes sense. But for our purposes here, it's just a lousy match.
So, I've installed my old friend Gallery, tied things in a bit in code, and now you can add your photos to an Open Mike listing immediately, no delays, no approval process, etc. You do need to be registered and logged in to openmikes.org, but that takes a few seconds.
See the Mocha Moo listing for an example of this feature in action. And remember, as with comments, submissions, etc. -- this is open to anyone. You don't have to be the host, the club owner, etc.