Paste e-mail addresses to add contacts to campaigns?

Paste e-mail addresses to add contacts to campaigns?

I can't seem to figure out how to do this easily, but the only way to add contacts to a campaign through various uploads or checking them off in the "Existing Contacts" dialogue?  Seems like there are lots of web apps out there that let you simply paste a list of e-mail addresses into a window and that gives you your list.  I'd love it if Zoho could implement this, unless it's already there somewhere...