I hate headhunters (I'm looking at you Atlantis) - another one called @ 4:45pm & I was forced to relive the horror of their existence. The interesting thing is that after I told her that I wasn't interested in pre-interviewing with her, she handed me off to someone else to try to pump me for information about the company I currently work for.
Ugh.

There is a personal reason for my dislike of headhunters...

So once upon a time, two employers ago, applied for a few jobs only to find out that the online listing was to a recruiting agency (a.k.a. Headhunter). I was younger and while I was bitter towards many things, that hostility had not spread to headhunters - yet.
I was asked to "pre-interview" with the headhunter to "approve" my resume. I should have known that it was slimy when they refused to validate my parking, sign some "promise" to let them know if I'm offered a position & the interviewer had absolutely ZERO idea what a programmer was.
A few days later they gleefully called me up & sent me to TWO interviews. That was a mistake.
The first company had no idea I was coming and hastily organized an interview that went bad as soon as the hiring manager said "I told them that I would be ready for interviews NEXT week."
The second company was even worse, their lobby was filled with applicants that were all sent over from the same headhunter. This is when I was first acquainted with the term "cattle call". I ended up leaving early to get back to my existing job.
When the headhunter called to send me to a third interview, I politely declined & asked them not to call me again. (a.k.a. "Shove it")

To be fair, a Completely different headhunter did get me my current Job at GameSpy - but due to the logistics of him being located 100miles away & myself arguing with him that I was perfect for the job (when he thought I wasn't) - he sent me anyways. :)

Now, whenever I get a call from a headhunter that wants to "pre-interview" me or some other BS, I politely ask them to forward my resume to the company looking to fill the position in question & allow them to decide if they want to interview me.
They usually get all huffy about that point.
My response: "if you would be so kind as to forward my resume to the employer's HR hiring manager, I'd be most appreciative"
Headhunter: "That's NOT how we do things"
Me: "Well, sorry it didn't work out" *click*

My current employment at a great company allows this luxury of honor (knock on wood). If you've got a job - I mean, why deal with the BS?
I'm the first to admit that my snobbish elitism would COMPLETELY vanish if my employment status would change for the worse - I've got baby on the way, a wife, and a couple of mortgages to deal with. I'm not stupid - you only get E.D.D. benefit checks for 6 months and it's generaly only enough to cover gas money & top ramen.