Julia - I just thought of this same idea - was coming to write it . . .

 

I would suggest that it not be sent to them - but rather the link bring them to the choralnet page, to help  people who don't know choralnet.  It could actually be a stock template page with text such as: 

Link provided by (or on) Choralnet - the Conductor of Choir member's  first stop for all things Choral.

 

Why not also make it possible to pop in anyone's email address to forward something to - not all folks (believe it or not) are on Facebook.  Just make sure of the security issue - don't want spammers picking up an entered email adrdress.  I think it could potentially make many more people aware of choralnet.