it's a nice feature but I assume your audience is also mainstream users. So, those people who are not technical users, most probably use webmail. Even, if they

it's a nice feature but I assume your audience is also mainstream users. So, those people who are not technical users, most probably use webmail. Even, if they do have another address (from their university) they would still probably login from the web or prefer not to use that address but that of their IM. just my thoughts..