I was in a similarly shitty position last year, applied for an MBA, MFA, and finally wound up in the Mass Communications Master's program I'm in now. Yeah, I'll be in more debt, but a Master's is now what a Bachelor's was when people told you a Bachelor's would get you a good job. It's still true depending on what you studied, but way too many people have Bachelor's now for it to be the huge draw for employers it used to be.
Anyway, my problem was a bit different in that I loved my out-of-school job, but just got way too few hours at said job. Now, I have a graduate assistantship I dig, I have the option to go on to get my doctorate with a thesis or do a Media Project and graduate with my Master's a more creative way, I've been able to take a trip to Los Angeles and make tons of connections in my field down there cause of a class I took, etc.
If you make decent money, I'd try to find another job first, since people hire you more easily if you're already working and then you can think about an MBA, which is one of the most realistically valuable degrees there is in the real world.
