Inviting multiple people

Thanks for this module. Its exactly what I was looking for.

I'd like to request a couple of changes to make it easier to invite multiple users. Instead of a one line text field for entering email addresses, it would be great if this could be a multi-line textbox and allow it to accept a lot more characters than just 128. Also change the button text from "Invite User" to "Invite User(s)" or just "Invite". This would make it much clearer to group admins that they can invite more than one person at a time.

Also, it would be nice if the addresses could be separated by either a new line character or comma so that one email address per line would be acceptable.

Often, my users want to set up a group and then invite say 50 people from their mailing list to join. If we could simply copy and paste the addresses into a text box and click invite, that would be great.

thanks