37 listed but I think they'll take 40 minimum.I also expect 4-5 to be players 'from nowhere' who step up in the next month or so.Launchbury will go, I think him, Manu, Ben Youngs and Farrell are the certainties from England (with Wood, Cole, Robshaw and Barritt all highly likely as well and 3-4 other maybes). I think it's very easy (as has happened in virtually every 'team of the 6N' I've seen) to forget that England were 4 from 4 and going for a grand slam before they choked in Cardiff, Gatland won't miss that when he picks the team so I expect about 2/3rds of the squad to be english and welsh, with Ireland and Scotland making up the rest. I think your right with the outside backs as I don't think any of the guys who played for England this 6N deserve a place.I'd maybe look at Mike Brown at FB as opposed to on the wing. I still think that performances in the Heineken Cup and the play offs in the Aviva and Rabo leagues will see some more players come into contention and as you say, there are always some players that seem to come from nowhere. Some of the French based players who didn't feature in the 6N (Sheridan for example) might also come into the reckoning.
If an english wing/FB makes the squad my money is on Johnny May