Since Facebook is becoming more and more popular these days as a way of marketing I thought I'd share how I'm working it with regards to high school seniors. 
I'm in my second year of really pushing seniors and using facebook.
Last spring I decided I needed some senior reps. So, I hit up facebook.
There are ways to search by class and school.....you can use the search for classmates tool...you might have to change your profile to that class in order to do it. I honestly don't remember the specifics because I have an "in" as my day job is as a high school teacher.
So, what you do is send a friend request to a few high school kids. When you send a friend request make sure and include a message explaining who you are and why you want to be their friend (so they don't think you're a creeper) and make sure and add them to a friend list. I have a list for class of 2010, 2011, and yes even 2012.
Once kids start accepting your friend requests go through their friend lists and look for more kids. Repeat. Repeat. Repeat.
I also keep an eye out for kids that look (based on their profile pics) like they would be photogenic and are in the following graduation class. So, as I was searching for class of 2010, I would come across 2011 kids and send them a request as well.
This builds you a base to start marketing to.
Then, I used the event option in facebook to create an event. I titled it "senior model search" or something similar. I included details, photos, web links, etc. Then, I invited all the kids in my class list (depending on which class I am marketing to). The event feature is super nice as it gives you feedback. You can see who is maybe thinking about working with you, those that decline, and those that are definitely wanting to work with you. You can also message your entire guest list with updates, reminders, etc. When sending messages from your personal account you are limited to just 20 people so being able to message them all at once is great!
I mainly use my personal page to market with because with a fan page you don't get notifications of when people become fans, comment, or write on your wall.
I also use my status to keep my name out there reminding kids of my current promo etc.
As your senior season draws to a close you can easily purge friends who didn't use you. Before you do though, once again sort through their friend lists and check for people from the following two years. Then, delete! HAHAHA. You've made it easy as you have them on a specific list.
I know for a fact this works. Last year I had 3 reps from local schools. This year I had 21 applicants and will be working with 15 kids. Many of them are those kids that I contacted as sophomores.
Another thing I have been doing as well is logging onto facebook chat as I'm working on this or just dinking off on facebook in general. A number of kids have contacted me this way. I also make sure and watch my comments. If someone comments on a photo I took I make sure and gently point out that I'm looking for a model/rep or having a promotion or something.
Another thing I plan to do is have my model/reps suggest me as a friend to kids in their schools as well as post any promos or anything to their statuses as well.
ETA: I also always tag the kids in their pictures and, many times the parents request to be a friend as well and so I will also tag the parent in the photo. That way I know the parents' friends (the other moms and dads that have the checkbook) will see the images as well.
ETA2: Make sure and HIDE your friend list. No sense helping out the competition if they decided to poach all of your hard work and steal your friend list. Trust me.
ETA3: (9/13/10): I've started getting my marketing list together for class of 2012. What I have done is enlisted the help of my senior models and even other clients. They get $1 print credit for every person they suggest to me as a friend from class of 2012 up to $50. They are loving it because it's easy print credit. I love it because it's WAY easier and less time consuming than searching them out myself.
So, that's what's been working for me.
SAMPLE WORDING
Friend request looking for models for current year
I hope to work with you!
Tiffany Austin
rfp studio
Friend request if I find someone interesting from the following year's class
My website is: http:rfpstudio.com
Thanks!
Tiffany Austin
rfp studio
And for an event promo:
Thanks!
Tiffany Austin
rfp studio




