You wouldn't be starting a program until Fall 2012 at the earliest, giving you (nearly) two years of experience in Jordan, which is significant international experience. Having the UN on your CV is also very helpful, especially for a school like SIPA, that is so connected with the UN. I think you have a great chance of being accepted there (can't speak to the other universities really, but you seem competitive to me).. Are there any relevant organizations in your current city that you could volunteer with, in addition to your job, or is your schedule too full now? That would certainly help, though I would apply in any case if I were you - ultimately, if it doesn't work out, you can always apply again after waiting a year or two.. Good luck!