F & W means you have been "Fanned" and they are "Watching" the auction. Since your points are tied up in an auction, it's better sense to watch what happens in the auction until the last minutes to see if it will be worthwhile to bid precious points.
Fanning is a social system. It denotes your popularity. A lot like Facebook and the number of friends you can brag. Since you've been fanned, the fanners would like reciprocation.