I just learned that the only option to get notified of a mention is via email, too bad! Why woould anyone who spends time on a social networking site want to have to be checking their email to see what's going on on the site and have their email cluttered by dozens on notifications is beyond me. If there are such users, email notifications could be made optional fo them but I believe most users would prefer on-site notifications. I know I would.
Also, it would be nice to have this celarly stated see more in the product descritption, I only learned about this when I bought the mode (didn't occur to me to ask beforehand as I didn't think anyone would develop a social networking mode with email notifications only)