I'm currently in Marketing/PR.
I'm going to echo everyone else and say that the market sucks for these types of jobs right now. I graduated last May and had a hard time finding a job. I have a background in Finance and almost went into a Finance related job since there's a lot more of those jobs out there than Marketing. It took me three months to find something!
Network, Network, Network. With Ad/PR, you will not find a job unless you know someone. Putting a resume on Monster or another online website will not get you a job in Marketing. The reason I got my job is because I kept in touch with my favorite professor; a friend of hers was working at a nearby company that needed an entry level Marketing/Public Relations coordinator. She recommended me and after two interviews, I had the job.
I love marketing. It's dynamic and I never do the same thing twice. It keeps me busy (although I'll flake off for a little while and log onto GC

).
Marketing jobs are more easily found with experience and once you get your foot in the door somewhere, you're good.
I want to get into Marketing Research or Product Management. Both of these marketing subfields are used in my dream job: Fashion Buyer for Bloomingdale's (like Rachel from Friends).