I'm deciding to go to Amecon next year and planning on doing a Sera Myu skit with fellow friends, and since the forums are down for the moment I can't acquire the rules to what is and what isn't accepted for the masquerade.
If anybody has entered the masquerade at Amecon, please enforce the general rules

Give it a chance it is next year if they annoucne it. However I will say you won't be entering the Masquerade. They have a seperate event called the Omake for performances.

If your doing a skit at ame it would be part of the omake not the Masquerade, you sould type amecon omake into to youtube to see what other skits people have done but this event is over a year away.

Oh I see! Thanks a bunch, I've never been to any other convention outside London Expo, so it's worth asking beforehand

Like others have said skits would be part of the Omake, you've got plenty of time to wait for the specific rules to pop up but they're reasonably basic.

The main one to keep in mind is the maximum time limit, I can't remember if it was 3 or 5 minutes but I'd err on the side of caution anyway, shorter is always sweeter.

Pre-record your audio wherever possible, and practice the crap out of the skit in advance