Hmmm, well I see nothing wrong with hot babes, and neither do most sane women. Heck, I'll even go so far as to say that despite popular opinion women are FAR more perverted than guys are.
*THAT* said, I myself have sort of felt that the women in Dragon Age (the game) aren't as hot as they should be. But I guess how hot they are is a matter of opinion. They sort of have the "Heroin Chic" thing going which is pretty popular nowadays, even if I don't find it all that attractive personally.
As far as the models being used for the characters being revealed, that's no big deal given the way games roll nowadays. I mean we've been here with Tera Patrick and Saint's Row 2 (albeit she was supposedly a producer), not to mention Eliza Dushku's role in the same game. Then with Assasin's creed they had the actress (name eludes me) who plays Claire in "Heroes" digitized which was a big deal.
As far as dudes go, I simply think they get less press coverage, but are definatly promoted the same way. Patrick Stewart appearing as "The Emperor" in Olivion comes to mind (the model even looks like a much older version of him), and I believe "The Rock" was digitized for "Spy Hunter" and that was heavily promoted at the time.
It should be noted that showing off the real girls in connection to a game like this is NOT nessicarly just to get the fanboys drooling. The girls themselves being models WANT to be shown off to get their names out there, so they will hopefully be recruited for more work (drool worthy or otherwise). As was pointed out the girls are relatively unknown, one doesn't even come up on a search... well because of this game people are going to learn who they are. If Dragon Age: Origins succeeds, it will be a good career move in their vocation of choice.
The big thing that gets me though is that both of the potential female love interests I've seen, strike me as being sneaky, manipulative types. That can be attractive, but it WOULD be nice if they had some differant personality types to romance.
Plus honestly, going with the atmosphere of the game, if Morrigan doesn't turn out to be a thinly disguised version of Morgan Lefay and any affair with her goes horribly wrong setting up the sequel, I will be fairly surprised.