A gap down today would offer a nice opportunity to cover shorts. Fed days have the tendency to melt up into the 215pm announcement, especially after a poor close the day before (yesterday). A pop usually occurs from 215-3pm which is usually something to be sold into again. A strong finish to Fed day many times results in a very weak tomorrow.
Game plan: Cover shorts early, go long early, sell longs after annnouncement, go short after announcment, cover shorts tomorrow. Ready? Break! :)