Had a Pugsley for a year, sold it a few winters ago for a tank of heating oil...
Superfunbike. Not the best tool in the chest for a lot of stuff, like insane downhill, cross country racing, extreme technical stuff, but just a blast for general off road goofing around.
There will be another fatbike in my future, I don't even have a decent mtn bike at the moment, but I work for a Trek dealer and the next mtn bike I will consider EP-ing will be a Farley.
Farleys were way popular last year, our bestselling $2000+ bike model in the shop, and Trek wisely introduced a lower-spec/price model. Customer brought in a Nashbar bike he got for under $1k for us to tune, and while it was heavy, it was a fatbike. BikesDirect has some reasonable priced ones, too.
Way too fun to go away, fatbikes are here to stay. May lure some offroad who have never done so or gave it up decades ago...