Nicolai Foss
Facebook and archtop don’t seem to mix well: One is for the adolescents, the other for grown-ups. Oh well, the average facebook account holder is steadily increasing (probably approaching 25 at the moment, which means there are lots of grown-ups joining the FB community).
Perhaps for this reason there are now at least two groups dedicated to archtops, Friends of the Archtop Guitar and The Acoustic Archtop Guitar: A Fansite. There are few members in each group (15 and 18, resp.), so if you have a FB account, pls join them.
Note that there also numerous jazz guitar groups, dedicated to, for example, Wes Montgomery, Lenny Breau, and Joe Pass.