I don't know about need, but I often use them for emails. I prefer a plain text email program (so no HTML mail to hide the link), and it's been my experience that many receiving email clients break overly long URLs. So I use Metamark[1], which I have a reasonable trust won't disappear in a week or a month.
I understand that you might not like short URLs in the wild (so to speak), but do you really not follow short links when sent to you from friends or relatives? (And, no, I don't mean short URLs from your aunt that sends you all the "funny You Tube" videos.)
[1] http://metamark.net/ (or http://xrl.us for the short link)