Just wondering if this category could show up in the future. Would be nice for demonstrating [censored] content. Right now .swf has to go into the 3D model category and get downloaded, but would seem more appropriate to classify as animation. However some stuff may be shorter than the 7-second rule or require user input to do stuff...
I'd propose some rules for Flash here which seem to work well for other sites: No auto-redirects, no malware/hijack behavior, no content which is not the uploader's, no objectionable content.
Other than that, I see things being a little bit less restrictive here than at other well-known flash sites. (Demos don't need to be that entertaining or meet some other arbitrary criteria, just show some artwork, games or other stuff that does something. Maybe doesn't matter if it's broke even?) And of course the feedback with comments and ratings as usual would be great.