i can twit you, chat you, email you, or send you my blogroll. it's all just formatted text meant to communicate. and albeit mail and chat being the stickiest apps online, to say that email is somehow better than facebook is a farce. there's no set standard mode of communication.
if someone makes an utility that can auto-scale your message though, that'll be nifty. so if i type less than 140 characters, i want it to show up on my twitter list. if i address it singularly i want it to be sent via email. if i type a long winded essay i expect it to be published somewhere somehow.