You meet a 'friendly' Vampire in a certain faction that uses a dark colored hand as its symbol. However, they are not what you would expect. =P
They arn't nearly so common as in Oblivion, probobly about the same as in Morrowind minus the clan bases, but i've found catching the disease this time around is a pain in the behind.
I actually kind of like the Cyrodiliic Vampires, and was always pained that the face bug made them practically unplayable. Now I actually can use them in Skyrim. I'm planning to make the cliche Vampire-Hunting Vampire who hates what he is. Plus, nothing says awesome like a supernatural and immortal Redguard with Thu'um on acid (or dragonsouls if you prefer).
Yes, i know there is a vampire in the dark brotherhood, a werewolf too but what most of us have issue with is that barely anything is changed, while i did not like the face bug or the wrinkles, i too liked the cyrodiil vamps and the "shape" of the vamp face but starving to get stronger is awful, i did not like that. People had hoped that it would be different this time around but sadly everything is more or less the same just a tad worse, and you still can't join vampire factions and like oblivion there is only like two or more vampires you can talk to, the rest just attack you on sight.
I like the eyes of the skyrim vampires but there is more negatives than positives, it should have been balanced but its not. stage 4 vampirism makes everyone hostile to you but it can be countered by feeding but there are still a lot more negatives, they should have added more bonuses for skills like swords (vampires have super-human strength and thus should hit harder) increased running speed, higher jumping and the ability to feed on anyone and anytime and not just when they sleep. (like a finishing move or feeding on their corpses)