not everyone is in the electronic age, nor wants to be. a simple mailed invitation is not a terrible thing to do for a fellow quilter. I tried and tried to get my granddtrs to learn how to write letters, to no avail. not everything in life is done on computers. whether people believe that or not.
i'm sure not all guilds would want to go to the "trouble" to do written invites and that's sad. post cards would work and don't cost much.