Bethesda are saying (at QuakeCon) that Dawnguard PC is out at last right now, but I can't get it come up on Steam just yet. But oh well, I'm sure it's either a caching thing or it'll be there any moment - me, I've just got to postpostpost and then sleepsleepsleep. Here's the official word though. I'm hearing it's $20 for the long-awaited, Vampire-centric Skyrim add-on. Now I'm off to clean my teeth. Good luck, enjoy, and see you tomorrow.
Update: and here it is on Steam to buy now. $20/£14 to you, sir or madam. That is not cheap as DLC goes, and the reviews were mixed, but I've not played it yet so don't look to me for answers. Unless they're about cats or Transformers, anyway.