User blog comment:Dentface/Test Server Release Notes - October 19th - Bug Fixes/@comment-67.87.1.67-20111021001115/@comment-2155069-20111021003341

It looks like this is the outfit that will be released for Halloween. It's been on the test server, but last time I checked (earlier today), the male outfit was still buggy. I'm sure it will be released on Live soon. I haven't heard about any other outfits. This is probably the only one.