I'm always wary, because of the "rules," to post links to specific sites. But since you asked so nicely (sure you just don't want to look at naked photos?)...
Here's a link to a British agency site that regularly sends providers to New York. They sent me this today as an ad for someone who will be visiting soon. I think the photos are both tasteful and pretty sexy. To use the now infamous UG phrase, "I'd do her." (If she weren't $700/hour!) I've never used the agency and don't really know much about them, except that I think they charge way too much.
www.atlanticcompanions.com/alexusa.html
That said, you can find hundreds of examples like this, with similar quality and taste. If you hire a half-way decent photographer who has some sense of decorum, you'll get more or less the same result, because they're all shooting with the same cliched ideal in mind.
Then there's the all too typical (these days) skanky, explicit CL ad, like this, that was clearly shot on the fly with a cheap digital camera:
http://newyork.craigslist.org/mnh/ers/289971287.html
Or this kind of thing, which is, essentially, useless (unless you guys are better at identifying butts than I am):
http://newyork.craigslist.org/mnh/ers/290070952.html
And then, of course, there's always this kind of overproduced, airbrushed, fantasy-girl site (which, in some ways, is about as useful as the CL link I posted above):
http://www.kateinlondon.com/
(Again, I know nothing about this particular provider; I just pulled her link off of Eros.)